MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply Today
Asked by Nina on 28 Dec 2012

Hi all,

I'm trying to do the following:

% simulate a Poisson process with rate \lambda = 3/2 lambda = 3/2; % MATLAB function poissrnd uses the waiting time method random_sample = poissrnd(lambda, 1, 4000)

% estimate the distribution p = poisscdf(random_sample, lambda)

% plot the distribution x = min(random_sample):1:max(random_sample) y = double(poisscdf(x, lambda)) z = x+1 plot(z,y)

but I keep getting this error message. Does anyone know what could the problem be?

Thanks a lot!

Answer by Jan Simon on 28 Dec 2012

Edited by Jan Simon on 28 Dec 2012

Accepted answer

I can guess only at the moment, that one of the commands has been defined as variable before, e.g. `poissrnd`, `poisscdf`, `min`, `max`, `double` or `plot`. The standard procedure to locate the problem is using the debugger:

dbstop if error

Then run your program again until Matlab stops in the line, which causes the error. Now let `which min -all` or whatever commands are used in the line show you the definition of the symbols. In general, avoid to use names of built-in functions as names of variables, because this causes problems frequently.

## 2 Comments

Direct link to this comment:http://mathworks.com/matlabcentral/answers/57544#comment_119513

Please post a copy of the error message, which reveals e.g. the line, which causes the error.

Direct link to this comment:http://mathworks.com/matlabcentral/answers/57544#comment_119657

Actually, it worked well after I tried to run it again. Thanks for your time!