run matlab and pass integer parameter from command line

Question

I have a matlab function and I was able to run it from command line. Now I want to pass a parameter to the file from command line. The parameter is a integer. It seems when I pass from command line, it is always taken as a "char".

Here is how I run the command

matlab -nodesktop -nosplash -r "mycommand 3"

For example, if I have a function as

function [ ] = mycommand( a )
a = a+3;
disp(a)
end

it prints 54 instead of 6.

Is there a way to work around this? I don't want to check the type of the variable in my code.

Thanks

MarkD · Accepted Answer · 2011-10-31 19:28:16Z

5

You need to execute the function as you would in the matlab interpreter:

matlab -nodesktop -nosplash -r "mycommand(3)"

(Notice the parenthesis around the 3)

answered Oct 31, 2011 at 19:28

MarkD

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Comments

Sam Roberts · Accepted Answer · 2011-11-01 11:31:49Z

1

MarkD gave a good answer. Although you mentioned you might be unhappy doing this (I'm sure for good reasons), another option would be to put a little extra code in to the beginning of your function, which would convert character inputs to numerical if the command were called via matlab -r:

if ischar(a)
    a = str2num(a);
end

answered Nov 1, 2011 at 11:31

Sam Roberts

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