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MATLAB QUESTIONS

polyfit and polyval funtions
polyfit and polyval funtions
wish help you to fix your issue Hello my question is about curve tiffing of P3(x) I write my code with using polyfit and polyval functions but I need to make it without using these functions. , Without Using syms
TAG : matlab
Date : October 22 2020, 06:10 AM , By : Alexandra Smith
Output a matrix size n x m, 1 when the sum of the indices is even, 0 otherwise
Output a matrix size n x m, 1 when the sum of the indices is even, 0 otherwise
This might help you Great to see you're learning, step 1 in learning any programming language should be to ensure you always add relevant comments! This helps you, and anyone reading your code. So the first improvement would be this:
TAG : matlab
Date : October 22 2020, 06:10 AM , By : nejaugi
Saving array in file and then loading it in Octave? Error: struct cannot be indexed with {
Saving array in file and then loading it in Octave? Error: struct cannot be indexed with {
To fix this issue When you load a mat-file with a single output argument, it loads the data into a struct with fields that are the names of your variables. w is a struct with field initialW after you call load.When you assign to a variable without an
TAG : matlab
Date : October 19 2020, 06:10 AM , By : G Consult
How does the MATLAB symvar function work?
How does the MATLAB symvar function work?
With these it helps I'm guessing you typed help symvar into the MATLAB Command Window, which is normally the best first step, but in this case you may have come across a small pitfall. This is because symvar is an overloaded function: there is more t
TAG : matlab
Date : October 17 2020, 06:10 PM , By : Ahmed Maher
Comparing elements in each row of a matrix and count the similar values
Comparing elements in each row of a matrix and count the similar values
this will help I have a matrix like this: , I would go for this:
TAG : matlab
Date : October 16 2020, 06:10 PM , By : sathish
No visible points for plot in for loop
No visible points for plot in for loop
wish help you to fix your issue I'm struggling with a plot I want to make using a for-loop. , You need to specify a marker. The documentation says:
TAG : matlab
Date : October 14 2020, 01:00 PM , By : awadhesh
Matrix with dynamic dimension in matlab
Matrix with dynamic dimension in matlab
I wish this help you Although the code here below works, you may consider @Sardar_Usama suggestion, working with cells. But I'm not too good with those...
TAG : matlab
Date : October 13 2020, 11:00 AM , By : user6025158
Compare two equal arrays but isequal() function return 0 in Matlab
Compare two equal arrays but isequal() function return 0 in Matlab
wish of those help According to setdiff it is possible for isequal to return 0 and setdiff to return empty.
TAG : matlab
Date : October 13 2020, 05:00 AM , By : Necromoni
Did the MATLAB R2019a mxArray header change?
Did the MATLAB R2019a mxArray header change?
this will help The mxArray header has changed in R2019a. The location of the CrossLink field in the mxArray header has moved next to the reverse CrossLink field. So, the order for R2018b and earlier is this:
TAG : matlab
Date : October 13 2020, 12:00 AM , By : abd4DESIGN
What is the colon operator doing here?
What is the colon operator doing here?
will help you I'd encourage you to take a MATLAB Tutorial as indexing arrays is a fundamental skill. Also see Basic Concepts in MATLAB. Line-by-line descriptions are below to get you started.
TAG : matlab
Date : October 12 2020, 09:00 PM , By : Ryan McCracken
Remove zeros from a matrix
Remove zeros from a matrix
will help you I have a matrix with large rows and columns as follows: , assuming A is a two dimensional matrix
TAG : matlab
Date : October 12 2020, 04:00 PM , By : sien
How to generate continuous numbers with repetitive increment in matlab
How to generate continuous numbers with repetitive increment in matlab
help you fix your problem I would like to generate a continuous number with repetitive increment, for example,from 1 to 3. with a repetitive increment of 1 (x 5). so the output will be. , Let
TAG : matlab
Date : October 12 2020, 07:00 AM , By : Tyrone Roberts
Counter in Matlab-mex code does not stop after predetermined iterations
Counter in Matlab-mex code does not stop after predetermined iterations
To fix this issue printf is translated to mexPrintf, which causes the given formatted string to be displayed in the MATLAB command window. You are not using the C library printf here. mex.h declares a macro to make this translation.The MATLAB MEX int
TAG : matlab
Date : October 12 2020, 02:00 AM , By : Jerlyn Peh
Why is my line object being registered as a double in app-designer Matlab?
Why is my line object being registered as a double in app-designer Matlab?
Hope this helps In the past, all graphics handles were numbers. It is only since release R2014b that these are special objects. When they introduced these objects, they made sure old code could continue working. One of the consequences is that handle
TAG : matlab
Date : October 11 2020, 04:00 PM , By : mar83
Is the PrincipalAxisLength measurement equivalent to the object diameter in the regionprops3 output?
Is the PrincipalAxisLength measurement equivalent to the object diameter in the regionprops3 output?
it fixes the issue The documentation for the PrincipalAxisLength shape measurement describes it as (emphasis mine):
TAG : matlab
Date : October 11 2020, 01:00 PM , By : Vee
Logical Masking in Matlab - How to (instantly) index concatenated Matlab array?
Logical Masking in Matlab - How to (instantly) index concatenated Matlab array?
this one helps. You can use structfun to apply a function to each field of your structure. structfunis basically a hidden for loop.Example:
TAG : matlab
Date : October 11 2020, 10:00 AM , By : Angel Lai
Generate random movement for a point in 3D space
Generate random movement for a point in 3D space
This might help you For such a task, you may find useful Perlin Noise or even Fractal Brownian Motion noise. See this implementation in JavaScript:
TAG : matlab
Date : October 11 2020, 09:00 AM , By : scholarchen
MATLAB Data Cursor won't click on every point of plot (R2018b)
MATLAB Data Cursor won't click on every point of plot (R2018b)
This might help you Found the solution:In the code, this needs to be set after the plot:
TAG : matlab
Date : October 11 2020, 07:00 AM , By : user6032289
Matlab angle function to compute phase
Matlab angle function to compute phase
seems to work fine You should compute phase with atan2:
TAG : matlab
Date : October 11 2020, 06:00 AM , By : Siddharth Asaithambi
Quiver plot without arrow stem
Quiver plot without arrow stem
may help you . 'LineStyle','none' didn't work because the style applies both to the stem and to the head, so setting it to none hides both.This can be solved by digging around some undocumented properties of the Quiver object. Exploring the propertie
TAG : matlab
Date : October 11 2020, 12:00 AM , By : Rosbaek
MATLAB Crashes During the Timer Object Deletion
MATLAB Crashes During the Timer Object Deletion
like below fixes the issue The solution I am currently using is adding a short pause between stop and delete. It's a kind of a patch, and I am not sure if it's going to work for you.
TAG : matlab
Date : October 10 2020, 08:00 PM , By : Nicola La Rocca
How to run a .mexw64 file on Mac?
How to run a .mexw64 file on Mac?
Does that help A mexw64 file is compiled for Win64 systems, the equivalent extension for macOS is mexmaci64 - this file simply wasn't meant to be used on a macOS. You should try to contact the authors of the file and ask them to recompile it for Mac,
TAG : matlab
Date : October 10 2020, 06:00 PM , By : Bissel
Polyfit and Polyval in Matlab
Polyfit and Polyval in Matlab
like below fixes the issue I want to understand the functions polyval and polyfit. At First I programming in Matlab the following lines: , The 3rd output argument, changes the independent variable from
TAG : matlab
Date : October 10 2020, 01:00 PM , By : Oseong Kwon
illegal plot error when trying to use subplot
illegal plot error when trying to use subplot
I think the issue was by ths following , You just mixed the parameters of plot and subplot. Read subplot documentation.
TAG : matlab
Date : October 10 2020, 06:00 AM , By : Hussey Mirza
Calculate Interval mean of column in matlab (interval not fixed)
Calculate Interval mean of column in matlab (interval not fixed)
should help you out The accumarray function does just that:
TAG : matlab
Date : October 09 2020, 10:00 PM , By : Jay Kop
Surpress output when calling matlab live script from other live script
Surpress output when calling matlab live script from other live script
hope this fix your issue I have a live script (main.mlx) that is calling two other live scripts (sub1.mlx, sub2.mlx). I want the output to be shown when calling the subscripts by themself but not when I call the main script, though I want to display
TAG : matlab
Date : October 09 2020, 03:00 PM , By : Alexandr Capatina
plotting already saved handle in matlab
plotting already saved handle in matlab
With these it helps You can use copyobj to copy over the graphics element to a new figure:
TAG : matlab
Date : October 09 2020, 02:00 PM , By : takagi__
Compute binary line thickness in normal direction
Compute binary line thickness in normal direction
This might help you You can use distance transform to compute the distance of each interior pixel to the boundary. Matlab has bwdist to do that for you.Then you can extract the information for the skeleton pixels.
TAG : matlab
Date : October 09 2020, 09:00 AM , By : Tushar Pawar
Area measurement of fluorescent powder from finger contacts - batch processing
Area measurement of fluorescent powder from finger contacts - batch processing
this will help First, the data is useless without a scale, and the photos will be hard to process without a fixed set-up. I'd spend time to make a photo set up that minimizes glare and doesn't change scale, then try approaching the problem using the
TAG : matlab
Date : October 09 2020, 09:00 AM , By : Joe Mellon
How to perform addition modulo 2 to the power 64
How to perform addition modulo 2 to the power 64
it fixes the issue The maximum value of variables of uint64 type is 2^64-1 (in Matlab, intmax('uint64')) and when you do an addition operation that exceeds this value (overflow) then the result is 2^64-1, so your code will not work. For example:
TAG : matlab
Date : October 09 2020, 03:00 AM , By : JosephG
How can I use the Cyclic repetition option in the 'From Workspace' Simulink block to include Matlab data in Simulink?
How can I use the Cyclic repetition option in the 'From Workspace' Simulink block to include Matlab data in Simulink?
it fixes the issue To use the From workspace block your Matlab data must be in a specific format. E.g. for a sine wave signal you need to use a struct of the following format:
TAG : matlab
Date : October 09 2020, 02:00 AM , By : Jurgis Stasiunas
Can a MATLAB contour plot look like the one from Mathematica?
Can a MATLAB contour plot look like the one from Mathematica?
To fix this issue You can define your own color map and the number of different colors for each area of the contour plot. I just took 6 colors from the Mathematica plot and extrapolated them into 20 points.
TAG : matlab
Date : October 08 2020, 07:00 PM , By : Hamed Hamidi
Show datatips in a logarithmically scaled uiaxes
Show datatips in a logarithmically scaled uiaxes
seems to work fine I have encountered a problem using the new uiaxes object: after plotting my data, I can click on the data points then it will show a datatips displaying the X and Y data. When I change the scale of my X axis into a logarithmic one
TAG : matlab
Date : October 08 2020, 06:00 PM , By : jtruit01
How to superimpose two contour maps onto each other in matlab?
How to superimpose two contour maps onto each other in matlab?
this will help The end result you seek is possible using contourc or using contour specifying the same contours (isolines). This answer extends this answer in Approach 1 using contourc and provides a simple solution with contour in Approach 2.
TAG : matlab
Date : October 08 2020, 04:00 PM , By : Siêu Quậy
Matlab Simscape vs Simulink vs PDE-Toolbox/Ansys/Comsol
Matlab Simscape vs Simulink vs PDE-Toolbox/Ansys/Comsol
will be helpful for those in need Fist of all, simscape is a fully self encompassed toolbox so you don't need the PDE toolbox to run it.Moving on to the larger question, simscape differs from simulink in how it handles data signals and ports. Standar
TAG : matlab
Date : October 08 2020, 04:00 PM , By : alexgriff
PowerPoint + Matlab PasteSpecial (Alt+e+s)
PowerPoint + Matlab PasteSpecial (Alt+e+s)
I hope this helps you . This happens more than I'd like... when I construct a question for SO, I figure out the solution about 15 min after posting the question. AFTER I've spent hours previously trying various solutions and searching the web.Turns o
TAG : matlab
Date : October 08 2020, 08:00 AM , By : Slattery's
What is the difference between a uint8 and a single image?
What is the difference between a uint8 and a single image?
help you fix your problem imagesc just calls image underneath. As for image, it behaves a bit differently if integers or floats are supplied, as can be learned from image's documentation:
TAG : matlab
Date : October 08 2020, 04:00 AM , By : wait
How to find peaks in a binary image
How to find peaks in a binary image
To fix this issue You cannot use findpeaks with an image.However, you can extract the data plotted in the image, and apply findpeaks on that. To extract the data, we first threshold to avoid very low gray values introduced in the image by the JPEG co
TAG : matlab
Date : October 08 2020, 02:00 AM , By : Ravi
Extracting certain part of a string using strtok
Extracting certain part of a string using strtok
hop of those help? strtok treats every character inside the second input argument as a separate delimiter. For example, when calling:
TAG : matlab
Date : October 08 2020, 12:00 AM , By : Anindya Mallick
Calculating geodesic distance in MATLAB
Calculating geodesic distance in MATLAB
seems to work fine Can you use bwdistgeodesic or graydist in the Image Processing Toolbox directly on the image grid?https://www.mathworks.com/help/images/ref/graydist.html https://www.mathworks.com/help/images/ref/bwdistgeodesic.html
TAG : matlab
Date : October 07 2020, 10:00 PM , By : BigB
Why can't I use 'scatter3' here?
Why can't I use 'scatter3' here?
this one helps. As shown in the documentation, X, Y, Z must be vectors. (When you enter an article on mathworks from Googling, say, "matlab scatter3", you will first see the syntax for the function. Blue text means hyperlink. All the inputs are linke
TAG : matlab
Date : October 07 2020, 07:00 PM , By : user6044110
How to cut out parts of the y-axis for certain x-values in Matlab plots
How to cut out parts of the y-axis for certain x-values in Matlab plots
wish help you to fix your issue There is this packagehttps://nl.mathworks.com/matlabcentral/fileexchange/45760-break-y-axis
TAG : matlab
Date : October 07 2020, 05:00 PM , By : Ricardo Mendes
I want to write 0 & 1 in binary file in form of bits
I want to write 0 & 1 in binary file in form of bits
this will help suppose i have a vector V=[0 0 1 1 0 1 0 1 1 0] which contains only 0 1 binary digits.presently datatype of vector is double. I want to write a code in MATLAB which write this vector in a binary file, in such a way that each element o
TAG : matlab
Date : October 07 2020, 03:00 PM , By : Arvind Patil
Does MATLAB use "0" to represent infinitely-many solutions?
Does MATLAB use "0" to represent infinitely-many solutions?
should help you out Zero is a correct solution for a: it's the "simplest" one. By default, solve will just return one solution for a case with infinitely many, and that one solution happened to be zero here. However, you can get a set of parameterize
TAG : matlab
Date : October 07 2020, 01:00 PM , By : Ajay
Program to find prime numbers in MATLAB
Program to find prime numbers in MATLAB
Any of those help I wrote some code to display the prime numbers between 2 and a user-chosen number, following the pseudocode on wikipedia. I am not sure why this does not work, as I have the increments correct following Erastothenes' Sieve. Please h
TAG : matlab
Date : October 07 2020, 11:00 AM , By : Derek
How to calculate cosine similarity between two frequency vectors in MATLAB?
How to calculate cosine similarity between two frequency vectors in MATLAB?
around this issue Take a quick look at the mathematical definition of Cosine similarity. From the definition, you just need the dot product of the vectors divided by the product of the Euclidean norms of those vectors.
TAG : matlab
Date : October 07 2020, 10:00 AM , By : Kristian Kirilov
How to translate ABM Model from MATLAB to NetLogo?
How to translate ABM Model from MATLAB to NetLogo?
hope this fix your issue Short answer, no. There is an extension (see https://github.com/mbi2gs/netlogo-matlab-extension/wiki) to, for example, transfer variable values between Matlab and NetLogo, but there is no way to turn Matlab code into NetLogo
TAG : matlab
Date : October 07 2020, 06:00 AM , By : Thaviel
webread giving different results than 'View Page Source' of webpage
webread giving different results than 'View Page Source' of webpage
Any of those help The difference likely stems from a different User Agent that is used by your MATLAB vs your browser. Here's an example that illustrates this:
TAG : matlab
Date : October 07 2020, 03:00 AM , By : steve.b
Portable declaration of REAL variables in mex gateway for Fortran
Portable declaration of REAL variables in mex gateway for Fortran
I wish did fix the issue. REAL*4 and REAL*8 are non-standard and non-portable. REAL(KIND(0.0D0) gets you DOUBLE PRECISION on every platform, as this is required by the Fortran standard.I can't speak to MEX gateways, but you should avoid obvious non-s
TAG : matlab
Date : October 07 2020, 02:00 AM , By : j.a.duke
How to fix the difference in precision between double data type and uint64
How to fix the difference in precision between double data type and uint64
like below fixes the issue double(2^64) is already the wrong result, the double type can hold only up to 2^52-1 as an integer without rounding.Also, when you do uint64(2^64), the power is computed using double, giving the wrong result, which you then
TAG : matlab
Date : October 07 2020, 02:00 AM , By : AdrianVHZ
CTRL + C is not working while ROS video callback is working
CTRL + C is not working while ROS video callback is working
wish help you to fix your issue MATLAB responds to CTRL-C only at certain times. Lines of code in the MATLAB language respond immediately, but If you are calling into a library not written in MATLAB, then the CTRL-C will only take effect when control
TAG : matlab
Date : October 06 2020, 10:00 PM , By : rjonke
How to simulate random point following multivariate t distribution?
How to simulate random point following multivariate t distribution?
I hope this helps you . The MeanThe t distribution has a zero mean unless you shift it. In the documentation for mvtrnd:
TAG : matlab
Date : October 06 2020, 10:00 PM , By : rule
Parallellising the factorisation of triangle numbers
Parallellising the factorisation of triangle numbers
To fix the issue you can do The sequence of triangle numbers is generated by adding the natural numbers. So the 7th triangle number would be 1+2+3+4+5+6+7 = 28. The first ten terms would be: 1, 3, 6, 10, 15, 21, 28, 36, 45, 55. The factors contained
TAG : matlab
Date : October 06 2020, 08:00 PM , By : Emmanuel Anthony Mar
How can I do side-by-side simulation of Simulink files by using for-loop in MATLAB GUI or is there another way to do it?
How can I do side-by-side simulation of Simulink files by using for-loop in MATLAB GUI or is there another way to do it?
To fix the issue you can do I want to ask how I make the following code functioning for side-by-side simulation of Simulink files, which are saved in 'PATH', by using for-loop in MATLAB GUI or if you know an alternative way to do it. After I started
TAG : matlab
Date : October 06 2020, 07:00 PM , By : Dan
How to compare the values of an one-dimensional matrix with each other?
How to compare the values of an one-dimensional matrix with each other?
wish helps you In an array (a) with indexes from 1 to m, I want to compare the values of this array one by one with each other, and if the distance (Difference) between two values is more than a value (z), for example, the difference between a(i) and
TAG : matlab
Date : October 06 2020, 07:00 PM , By : Adrián Alcolea
Conflict between 'ShowText' and 'LineStyle' in the contourf function in MATLAB R2019a?
Conflict between 'ShowText' and 'LineStyle' in the contourf function in MATLAB R2019a?
I think the issue was by ths following , After a bit of research I found this solution with the help of undocumented MATLAB:
TAG : matlab
Date : October 05 2020, 12:00 PM , By : Leidy
How to load tables and save tables from different .mat files and create new table dimension for each file
How to load tables and save tables from different .mat files and create new table dimension for each file
it helps some times I think you just need to add a column in each table before concatenation
TAG : matlab
Date : October 05 2020, 07:00 AM , By : Warnasi Perera
How can I calculate int(exp(sin(x)),x) in MATLAB
How can I calculate int(exp(sin(x)),x) in MATLAB
it helps some times The expression exp(sin(x)) does not have a known analytical formula for it's indefinite integral. Mathematica agrees with Matlab on this: http://m.wolframalpha.com/input/?i=Integral+e%5Esin%5Bx%5D+dx.While you can't evaluate the i
TAG : matlab
Date : October 05 2020, 05:00 AM , By : John Yeager
MATLAB improving performance of sum operator
MATLAB improving performance of sum operator
This might help you This uses a for loop, which according to Matlab lore is a big no-no, but is ~40% faster.
TAG : matlab
Date : October 05 2020, 03:00 AM , By : zgwmwy
How to obtain an equation for a line fitted to data
How to obtain an equation for a line fitted to data
this one helps. From the documentation on histfit:
TAG : matlab
Date : October 05 2020, 01:00 AM , By : user6053180

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