Matlab simulink toworkspace block plot problem?

I have problem with the plot. I want to plot the graphics from simulink with the to workspace block. It is plotting but the time axis is starting from wrong value. For example my time is 3 , it must be plotted from zero to 3 but it is plotting 2.7 to 3. This is wrong. How can I fix this? Can you help me?

Answer 1

[Azzi Abdelmalek]

Use a Clock block connected to to workspace block to get the simulation time t, then

plot(t,y) % should start at 0

[Azzi Abdelmalek]

Can you post your simulink model? or give more informations about your model

[Mustafa Ertay]

The vector lenghts of the variables are different so I constraint the workspace tout variable to other variables' lenght to plot. It becmoes same length but When I plot them it is plotting but the time axis started from 2.7.

[Azzi Abdelmalek]

The time vector and your signal should have the same length, instead of to workspace block, use a scope, then set the properties of your scope like below:

1. in History uncheck Limit data points to last and check save data to workspace , and set variable name to data
2. simulate your system then, in workspace type

t=data.time;
y=data.signals.values
plot(t,y)

[Mustafa Ertay]

it works. Thank you :)