I want to plot mat file

I want to plot mat file with command s=load('signal.mat'); plot(s) but there is error in that command how to plot the signal

[madhan ravi]

Upload .mat file

[sandhya sandhya]

Thank you for reply . I uploaded mat file .please give me any other command.

[madhan ravi]

FYI there is no file attached , please click the paper clip button and then upload it.

[sandhya sandhya]

Thank you for reply .I attached my file

Answer 1

[Stephan]

Hi,

s = load('signal.mat');

will give you a struct s containing fields with your variable(s) in it. Access this data fields with the dot-Notation:

 plot(s.your_variable_name_to_plot)

should work.

EDIT:

Your file contains a numeric Matrix of size 10x20480 which appears like 10 data sets - which shall be plotted?

s = load('signal.mat');
plot(transpose(s.val))

will plot all the data in one plot:

Best regards

Stephan

[sandhya sandhya]

Thank you for reply plot(s.your_variable_name_to_plot),please explain in detail . my variable is 's' here and i tried to plot with commands s=load('s2.mat'); plot(s) but its not working .please give me another command.

[Stephan]

If you load a mat-file this way you will see, that s is a variable of the type struct . A struct is like a container for variables and it contains fields in which the values are saved. See this example:

s = load('DataForForumQuestion.mat')

s = 

    struct with fields:

      XData1: [8688×1 double]
      XData2: [8832×1 double]
      YData1: [8688×1 double]
      YData2: [8832×1 double]

In this case here are 4 variables in 4 fields of the struct s. if i want to plot YData2 for example i have to use:

plot(s.YData2)

If you want to avoid saving the data in a struct, you should use:

load('signal.mat');

without declaring a new variable s. In this case the data will directly be loaded into workspace and can be accessed directly.

Best regards

Stephan

[sandhya sandhya]

Thank you for reply sir

[Stephan]

See my edited answer

[sandhya sandhya]

Thank you sir its working.

[sandhya sandhya]

My signal variable value is 1*2560 double and i tried this code to plot the signal s = load('test.mat'); val = (val - 1024)/200; signal = val(1,1:1000); Fs = 360; t = (0:length(signal)-1)/360; plot(t,signal ),grid on we can plot the signal with the above command lines.But can anybody explain about this code.