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How can I have a function that has a string as the input.
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I am trying to make a function that requires you to input the name of a color to get the output. My code, for example, is:
function [] = displayColor(color)
if color == 'black'
disp('black line');
plot(x.^2);
elseif color == 'blue'
disp('blue line');
plot(x.^3);
end
When I do this, I get the error:
Error using ==
Matrix dimensions must agree.
Error in displayColor (line 4)
if color == 'black'
How do I fix this so I can input a string as the function variable??
1 Comment
Stephen23
on 1 Apr 2018
Do NOT use == to check if character vectors are the same. Use strcmp or strcmpi.
Answers (1)
David Fletcher
on 31 Mar 2018
Edited: David Fletcher
on 31 Mar 2018
You need to use strcmp(string1,string2) to compare as the size of the color variable might be a different length to whatever fixed length string you are trying to equate it with (which is why you are getting the error).
3 Comments
Walter Roberson
on 1 Apr 2018
if strcmp(color, 'black')
The input to the function would be like displayColor('black')
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