Error using plot Invalid first data argument. How i can solve it!?

I ave this function, but when i start it, this returns me:

Error using plot

Invalid first data argument.

Error in cal_flowGP (line 53)

plot(flow);

any help please? Thanks a lot!

[Star Strider]

Typing:

whos flow

in your code or the Command Window may help you find the problem. Pay special attention to Class.

Answer 1

[Sainath Varikuti]

Check the values of the 'flow' variable in the MATLAB Workspace Window.

Answer 2

[Walter Roberson]

At that point in your code, "flow" is not a variable, so it is being interpreted as a call to the routine named "flow", but you are not passing arguments into that call.

You should check the variable names you are using; you will find that you assigned your data to some other name, or the place you assigned it is not in the same scope as where you are trying to use it.