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Why coerce not triggered when i use ""*Point


By : user6021341
Date : October 18 2020, 06:10 PM
I hope this helps . The catch here is that while Ruby allows you to redefine operators for this, these are very particular about the ordering.
Remember that this code:
code :
point * 2
point.send(:*, 2)
2 * point
2.send(:*, point)


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In Ruby, how to implement "20 - point" and "point - 20" using coerce()?


By : john jimmy
Date : March 29 2020, 07:55 AM
help you fix your problem Subtraction is not a commutative operation, so you can't just swap operands in your coerce and expect it to work. coerce(something) should return [something_equivalent, self]. So, in your case I think you should write your Point#coerce like this:
code :
def coerce(something)
  if something.is_a?(Fixnum)
    [Point.new(something, something), self]
  else
    [self, something]
  end
end

Can't coerce R to use "." as decimal point


By : Jeff
Date : March 29 2020, 07:55 AM
To fix this issue I can't coerce R to use "." as decimal point, although I used the argument: 'dec=","' , Your numbers are quoted, so they are read in as text.
code :
DF <- read.table("http://www.loaditup.de/files/783502_n4vrencc5p.txt", na.strings=".")
DF$DTCHGUS <- as.numeric(gsub(",",".",DF$DTCHGUS))

head(DF)
#        Date DTCHGUS
#1         NA  1.9020
#2 1980-01-01      NA
#3 1980-01-02  1.8922
#4 1980-01-03  1.8900
#5 1980-01-04  1.8910
#6 1980-01-07  1.8890

Error in as.data.frame.default: cannot coerce class "c("reactiveExpr", "reactive")" to a d


By : Ravi Teja
Date : March 29 2020, 07:55 AM
This might help you As Chi Pak has mentioned, reactive expressions must contain () at the end. Changing d.f to d.f() fixes the issue.

Error in as.data.frame.default: cannot coerce class "c("reactiveExpr", "reactive")" to a d


By : munnahsteph
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I think that the problem is that your reactive does not know what pos variable is in case that if statement is not executed, that is in case input$line == 'All'. Then you are asking it to return variable unknown in the context.

Cannot coerce class ""histogram"" to a data.frame error in when plotting a graph in Shiny


By : Elina Melamed
Date : March 29 2020, 07:55 AM
Any of those help Since I don't have googleAnalyticsR set up, I reduced your problem to his simple app.
code :
library(shiny)

shinyApp(
  fluidPage(tableOutput("table")),
  server = function(input, output, session){
    output$table <- renderTable({hist(mtcars$mpg)})
  }
)
## Warning: Error in as.data.frame.default: cannot coerce class ""histogram"" to a 
##   data.frame
shinyApp(
  fluidPage(plotOutput("plot")),
  server = function(input, output, session){
    output$plot <- renderPlot({hist(mtcars$mpg)})
  }
)
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