Multiple plots on the same graph

Hello!

I know this question have been frequently asked but since i still get an error after trying all the proposed solutions here, i decide to post my problem:

i generate PDF values and i want to plot all of them on the same graph with the same x axis:

Path3='C:\matlab\OutputDateien\DataAnalyse\01_A01\hhe';     
P3=strcat(Path3,'\PSDPDFs\06\');     
S3=(fullfile(P3,'*.mat'));
AllFiles3=dir(S3);
load('C:\matlab\OutputDateien\tc.mat');             %loading my period vector
figure;
for kk=1:length(AllFiles3)         %:numel(AllFiles)
    File3=AllFiles3(kk).name;
    semilogx(tc,File3);                
    hold on;
    xlabel('Period (s)')
    ylabel('Power 10*log10 (m/s^2)/Hz or dB')
    title('PSD diagram ')
    axis tight
end
hold off

i try to use hold on function after my plot but i get this following error:

Error in color/linetype argument.

Error in PSDplot (line 37)

semilogx(tc,File3);

since i got 500 PDF vectors i think using a loop would be better instead of plotting them like semilogx(tc,PDF1, tc,PDF2, tc,PDF2,...)

tc and PDF have both the same length (113).

Answer 1

[Matt J]

I think the line where you plot is supposed to look like,

 semilogx(tc,PDF);

but the code you've posted contains no variable called PDF. Instead you have,

semilogx(tc,File3)

where File3 is not even vector of numeric data. It's just a file name.