Inputting Data from my workspace into Simulink

3 views (last 30 days)
Sean O'Kane
Sean O'Kane on 13 Oct 2021
I have a data series I would like to input into Simulink that has been calculated within my Matlab workspace, when I use the "From fworkspace" block I get these errors:
Unsupported input format for From Workspace block 'FC_Simulink_Model_V2/From Workspace'. Available formats are double non-complex matrix, a structure with or without time, or a structure with MATLAB timeseries as leaf nodes. All formats require the data to be finite (not Inf or NaN).
Component:Simulink | Category:Model error
Invalid matrix variable specified as workspace input in 'FC_Simulink_Model_V2/From Workspace1'. The matrix data must be a real, double, have two dimensions, and at least two columns. The first column must contain time values and the remaining columns the data values. Matrix values cannot be Inf or NaN.
Component:Simulink | Category:Model error
I think this is due to the fact that the data series doesn't have a time stamp and is just one column of 1Hz data. I removed the time stamp earlier on in the Matlab processes as some data was redundant and had to be removed. I am hoping to be able to input this data as it is, but I am unsure of the block settings, etc. that will allow me to input the data.
  3 Comments
Mathieu NOE
Mathieu NOE on 13 Oct 2021
you should do this in your initialisation script (if you have done one)
it's fairly simple to create a time vector if you know how many samples and the time increment / sampling frequency

Sign in to comment.

Answers (1)

Harikrishnan Balachandran Nair
Hi,
I understand that you are having a 1-D array in your base workspace, that you want to import to your simulink model.
If the input is not a time-series, you can directly use the 'constant' block, with the variable name specified in the 'Constant value' field, inside the block parameters. In this case,according to your model, you will get a 2558*1 array as input at each time-step.
If you want the input as a time-series, you may use the 'from workspace' block, with the input format being in one of the supported formats specified here : https://www.mathworks.com/help/simulink/ug/load-data-using-the-from-workspace-block.html#d123e200736
As an example, in the provided case, you can easily make a time-series object with the data that you have in the workspace, and the sampling time of the model. As an example, if sampleTime=0.01, and number of steps taken is 2558 , the following code can be used before running the model.
sampleTime = 0.01;
numSteps = 2558;
time = sampleTime*(0:numSteps-1);
time = time';
Engine_power=timeseries(Engine_powerdata,time);
You can refer to the documentation provided to get a better idea on the 'From Workspace' block.

Products


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by