plot, Invalid first data argument

I cannot find what's the problem with the below code. It gives me invalid fist data argument erorr. I want to plot four graphs on one figure.

Case={'Obs', 'Q0', 'Q3', 'Q4'};

for i=1:4
    load(sprintf('Monthly_Mean_Precip_%s.mat',Case{i}));
end

for j=1:4
    Precip{j}=sprintf('Monthly_Mean_Precip_%s',Case{j});
end

Ncomponent = 4;
for PrecipNo=1:Ncomponent 
  figure;
  plot(Precip{PrecipNo});
end

Answer 1

[Sean de Wolski]

dbstop if error

Then run the above *.m file. It will stop with the debugger and you'll be able to investigate what is going on.

[Bum]

It stopped after 'figure'. The error occurs on the line 'plot(Precip{PrecipNo}'

[Sean de Wolski]

so what does that look like?

Precip{PrecipNo}

Is that something you would expect to plot?

[Bum]

No, only plot window and no figure

[Sean de Wolski]

What is the output from the above - at the command line!!

Is it a vector, matrix, empty, string, object of class Sean, etc.?

[Bum]

'Monthly_Mean_Precip_%s' is 12x1 double.

[Bum]

Is the error in plot is because of the class of 'Precip{PrecipNo}' is char? Then what shoud I have to do?

[Sean de Wolski]

I don';t know. What does it look like as a char?