How to "extract" a variable name to a string ?

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StarBucK
StarBucK on 1 Mar 2019
Moved: Image Analyst on 26 Dec 2022
Hi
I need to make a lot of plot to debug my code.
For this purpose, I have a function that plots the vector I give her as input.
I would like to be able to get the name of the variable I am plotting, extract it in a string and use it to title my plot.
How can I do this in Matlab ?
Thank you for your help.
Illustrative, oversimplified example :
function plottingFct(quantityToPlot)
% Simplified example of what I would like to do
figure
plot(quantityToPlot)
NameOfVariableIPlot=ExtractNameOfVariable(quantityToPlot); % How can I do this ?
title(NameOfVariableIPlot);
end

Answers (5)

Alexey Budkov
Alexey Budkov on 14 Mar 2022
Try the following:
myvar = 1;
get_myvar_name = @(x) inputname(1);
get_myvar_name(myvar)

Walter Roberson
Walter Roberson on 1 Mar 2019
NameOfVariableIPlot = inputname(1);
Note that this will be empty if the input was an expression.

Image Analyst
Image Analyst on 1 Mar 2019
Try this: inputname()
Example:
function myfun2(a,b,c)
for m = 1:nargin
disp(['Calling variable ' num2str(m) ' is ''' inputname(m) '''.'])
end

Star Strider
Star Strider on 1 Mar 2019
Use the inputname (link) function:
function plottingFct(quantityToPlot)
% Simplified example of what I would like to do
figure
plot(quantityToPlot)
NameOfVariableIPlot=inputname(1); % How can I do this ?
title(NameOfVariableIPlot);
end
Qwerty = rand(1, 10);
plottingFct(Qwerty)

SIVAKUMAR KARURNKARAN
SIVAKUMAR KARURNKARAN on 26 Dec 2022
Moved: Image Analyst on 26 Dec 2022
just use following commend
strjoin(who)

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