how to create this type of plot having two signals on one axis?

Answer 1

[Cris LaPierre]

Just use plot with hold on. It looks like your X values determine how they align.

x1=1:5;
y1 = 5:-1:1;
x2=5:9;
y2 = 1:5;

plot(x1,y1,'g')
hold on
plot(x2,y2,'r')
hold off

[ASIF ALI]

i have two waveforms, i want to show them on same axes, like V1 and V2 signal, they have same time, how can i devide the time so that V1 appear first from 0 to 1 sec , and V2 appear second from 1 sec to 2 sec,like shown here

[Cris LaPierre]

Adjust the time vector of the 2nd signal by adding the end time of the first signal to it.

x1 = 0:4;
y1 = 5:-1:1;
x2 = 0:4;
y2 = 1:5;

plot(x1,y1,'g')
hold on
plot(x2+x1(end),y2,'r')
hold off

[ASIF ALI]

for workspace , should i import signal data as array or dataset?

[Cris LaPierre]

From the dataset documentation page:

"The dataset data type is not recommended. To work with heterogeneous data, use the MATLAB® table data type instead. See MATLAB table documentation for more information."

I would add that, if your data is all the same data type, then use an array (readmatrix instead of readtable)