Issues on dimension setting of FFT plot in MATLAB 2022a.

Hello everyone,

I have got an issue with the dimension setting, level of x-axis, y-axis, font size, style and “minor and major grid on” of the FFT plot of any signals in the MATLAB 2022a version.

FFT analysis can be obtained as an attached figure file. But there is not any option for editing the plot. How can I fix these issues?

[chagamreddy venkata subba reddy]

i also got same issue. unable to find solution.....

[chagamreddy venkata subba reddy]

can you tell me sir... if you found any solution

[Pemendra Kumar Pardhi]

Hi Chagamreddy,

This problem has been resolve in MATLAB2023a

[Habtamu asres]

are u sure bro?

[Pemendra Kumar Pardhi]

Yes, Now I am using Matlab2023a

Answer 1

[Nadia Shaik]

Hi Pemendra,

I understand that you want to edit the plots in the FFT Analyzer tool.

Unfortunately, editing the plots in FFT Analyzer is not possible. As a workaround, you need to re-create the plots manually. Refer the below pointers for more information:

• The following code shows how to reference the App handle and properties. For example, The Y-Axis limits of the plot can be modified once the ‘FFT Analyzer’ app is running with the code shown below:

 GUItitle = 'FFT Analyzer';
 hFFT = findall(0, 'type', 'figure', 'Name', GUItitle);
 hAll = hFFT.RunningAppInstance
 hAll.SignalAxes.YLim = [-600 600];

• The Y-Axis limits for the ‘FFT’ plot can also be modified by replacing ‘SignalAxes’ with ‘FFTAxes’. Both axes are ‘UIAxes’ objects. More information on ‘UIAxes’ object properties can be found at the link below: https://www.mathworks.com/help/matlab/ref/matlab.ui.control.uiaxes-properties.html

I hope the above information helps.

[Pemendra Kumar Pardhi]

Hi Nadia Shaik

Thanks for reply,

Actually this provides possible change in range of X-Axes and Y-Axes.

But if i want to change the dimensions of a figure like the outer dimension i can't do this in MATLAB 2022a or its higher version.

While in the previous version like 2018a and 2019a. These facilities are available.

Thanks

Pmendra Pardhi

[Nadia Shaik]

Hi Pemendra,

The 'FFT Analyzer' was introduced in MATLAB R2021a version. Can you let me know the name of the tool that you've used in versions MATLAB R2018a or R2019a?

[Pemendra Kumar Pardhi]

Hi Nadia Shaik

Thanks for the counties with this query.

In the contest of my query, I am using FFT analysis for obtaining the total harmonic distortion (THDs) of any signal.

With consider this simulink example:https://in.mathworks.com/matlabcentral/fileexchange/73229-three-phase-solar-photo-voltaic-system-control?s_tid=prof_contriblnk

In this simulation model, before the run the model scope's 3 setting was done as follows:

double click to scope3> go into the setting> log data to workspace> variable name as SCope2

For simplicity image is attached here below

After completion of run the model

Click on powergui and follows the following process

double click on powergui > Tools > FFT Analysis

as attached image

After got the FFT analysis (i.e. THD) of the signal as attached image below, there is not an option to change the image, like inner dimension fixed, change the x-axis and y-axis limits of the graph and so on.

However, in the previous version it was exist like as attached image here (inside the green color line)

If any solution for this pls suggested

Thanks

Pemendra Kumar Pardhi