MATLAB: Randi worked in a program I ran 5 weeks ago, today it doesn’t-what gives

randi

Dear all,

I had a perfectly-functioning program that used this line:

c = randi([1,n],mn,1)

where n and mn are integers. I've re-opened the program to do a monte carlo simulation, and all I get is an error message stating:

Error using randi

Too many input arguments.

Mind you, I haven't changed a coma in the program. I'm just running it again to re-acquaint myself with had I had done.

Any thoughts?

Best Answer

Don't write an m-file that is named randi, at least, if you will ever want to use randi. Try this:

which randi -all

If there is a function named randi that you created, then you did exactly that.

In general, avoid naming functions with existing function names. Check BEFORE you create that file.

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r = rand;

will give a positive number between 0 and 1. It will never be negative. You'll have to ask your teacher why he or she rejected that. Perhaps he/she wanted it multiplied by something, like r needs to go between 0 and 15:

r = 15 * rand(1);

Maybe you didn't write a function but just wrote a script. Maybe the function needed to have input and output arguments and you didn't give them. It's hard to say without seeing (1) your code that you showed your teacher, (2) the problem statement, and (3) your exact teacher comments. You'll have to ask your teacher for clarification.

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Remove the randi function here from your path:

C:\Users\maris\Desktop\Bachelor Thesis\mvgc_v1.0\mvgc_v1.0\utils\legacy\randi\randi.m

Either rename the file, delete it, or remove the folder from your path.

For an explanation of why it is a bad habit to shadow the names of internal functions, see this thread. As you see, stuff tends to break at some point.

Best Answer

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