Why does my summation program behaves weird?

Why does my summation program behaves weird?

By : Cindy LaTerra
Date : November 22 2020, 07:01 PM
Hope this helps Yesterday, I had to do a math introduction test, where I had to calculate the cardinality of a summation. I was lazy to write it out and I thought I'd just write a small C program to solve it. I felt confident that'll work, since I did much more complex programs, but I just can't get it to work. , This:
code :
int n = 2 * i + 1;
while(n <= 36){
    printf("%d\n", n);
    n = 2 * i + 1;

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set erase behaves weird

set erase behaves weird

By : Ram Mittal
Date : March 29 2020, 07:55 AM
This might help you You have an invalid set iterator. The standard prescribes no rules for what happens when you dereference an invalid set iterator, so the behavior is undefined. It is allowed to return 20. It is allowed to do anything else, for that matter.
GlassPane behaves weird

GlassPane behaves weird

By : Radu Zamfir
Date : March 29 2020, 07:55 AM
this will help Check out Backgrounds With Transparency for the probable reason for the problem and a couple of solutions. Basically because you are using a transparent background you need to make sure you paint the background of the glass pane yourself.
So I would create a custom panel to use as your glass pane so you can manage the painting of the background. Then you set this panel as the glass pane of the frame.
re.findall behaves weird

re.findall behaves weird

By : Utchi
Date : March 29 2020, 07:55 AM
To fix the issue you can do The source string is:
code :
s = r'abc123d, hello 3.1415926, this is my book'
print re.findall(r'-?[0-9]+(?:\.[0-9]*)?|-?\.[0-9]+',s)
import re,ast
s = r'abc123d, hello 3.1415926, this is my book'
print map(ast.literal_eval,re.findall(r'-?[0-9]+(?:\.[0-9]*)?|-?\.[0-9]+',s))
Weird output from double summation code

Weird output from double summation code

By : t0n1987
Date : March 29 2020, 07:55 AM
wish of those help Vectorization power for the troublesome summations.
The first equation:
code :
# double summation in numerator (including multiplier 2)
diag(cr) <- 0
double_sum.1 <- c(crossprod(wg, cr %*% wg))

# single summation in denominator
single_sum.1 <- c(crossprod(wg))

# result
double_sum.1 / (1 - single_sum.1)
dcv <- sqrt(diag(cv))

# single summation in numerator
single_sum.2 <- c(crossprod(wg * dcv))

# double summation in denominator (including multiplier 2)
double_sum.2 <- sum(tcrossprod(wg * dcv)) - single_sum.2

# result
PV <- c(crossprod(wg, cv %*% wg))
(PV - single_sum.2) / double_sum.2
i in 1:(length(wg)-1)
j in (i+1):length(wg)
dcv <- c(0.02, 0.03, 0.04)
cr <- diag(3)
sum_i (1 - w_i) ^ 2 * sigma_i^2
ODP .NET behaves weird

ODP .NET behaves weird

By : pablo-xor
Date : March 29 2020, 07:55 AM
wish helps you Your connection timeout is extremely low, 8 seconds in general and 10 seconds for the commands you are issuing, try increasing it to maybe a minute to see what happens. I have no idea how heavy your algorithms are, but it is enough that one thread somewhere fails with a query in less than 8 seconds and you will get that exception.
Also, I cannot find documentation stating that ODP.net is not thread-safe, but I cannot find any documentation saying it is either, so if nothing else helps try this change:
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