Randi worked in a program I ran 5 weeks ago, today it doesn't-what gives?

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Fede C 2018 London 2019-10-17

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评论： Guillaume 2019-10-17

采纳的回答： John D'Errico

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?

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Answer 1

John D'Errico 2019-10-17

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编辑：John D'Errico 2019-10-17

在 MATLAB Online 中打开

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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Fede C 2018 London 2019-10-17

在 MATLAB Online 中打开

I did, yes. The first four lines below are the error messages (in red).

Error using randi
Too many input arguments.
Error in COHforMC (line 181)
c = randi([1,n],mn,1)

>> which randi -all
C:\Users\federico\Documents\MATLAB\mvgc_v1.0\utils\legacy\randi\randi.m
C:\Program Files\MATLAB\R2018b\toolbox\matlab\randfun\@RandStream\randi.m            % RandStream method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\parallel\@codistributed\randi.m      % codistributed method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\parallel\@codistributor1d\randi.m    % codistributor1d method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\parallel\@codistributor2dbc\randi.m  % codistributor2dbc method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\parallel\@distributed\randi.m        % distributed method
C:\Program Files\MATLAB\R2018b\toolbox\distcomp\gpu\@gpuArray\randi.m                % gpuArray method
built-in (C:\Program Files\MATLAB\R2018b\toolbox\matlab\randfun\randi)               % Shadowed

Stephen23 2019-10-17

编辑：Stephen23 2019-10-17

" I don't have a script named randi, or a function with that name."

MATLAB disagrees with you:

C:\Users\federico\Documents\MATLAB\mvgc_v1.0\utils\legacy\randi\randi.m

Guillaume 2019-10-17

It appears you're using this toolbox. Delete it or at least remove it from your path since it shadows built-in functions randi and rng and maybe more.

I would also recommend getting in touch with them to complain about that shadowing.

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