Does anyone know how to load .mat file into app designer for plotting?

% this is the example of how I load .mat file in normal MATLAB editor window. I want to load in MATLAB app designer too. can anyone help me?
load SBC1.mat
BD1 = SBC1.VarName1;
SD1 = SBC1.VarName2;
load SBC2.mat
BD2 = SBC2.VarName1;
SD2 = SBC2.VarName2;
load SBC3.mat
BD3 = SBC3.VarName1;
SD3 = SBC3.VarName2;
load SBC4.mat
BD4 = SBC4.VarName1;
SD4 = SBC4.VarName2;

[Walter Roberson]

Duplicates https://www.mathworks.com/matlabcentral/answers/2052197-how-to-load-mat-file-into-app-designer-to-plot?s_tid=srchtitle

[Subathra Nilamegan]

Hi Sir, thank you for replying. Even I change the code, the error says VarName1 is unrecognizable. i checked in the .mat file . The column named VarName1 actually. So, I don't know where I did mistakes.

Answer 1

[Image Analyst]

Try this:

s = load('SBC1.mat')

Don't use a semicolon and type that into the command window. What do you see? It should list the names of the variables contained in the SBC1.mat file.