As far as plotting a circle, I would use SIN and COS to create the data points and then use the plot command to display them on the block icon. There is a tech support solution that shows how this is done with a MATLAB figure here. You could put the following code in the initialization commands:

th = 0:pi/50:2*pi;
xunit = cos(th);
yunit = sin(th);

And the following in your icon drawing commands:

plot(xunit,yunit)

Make sure your Icon units is set to Autoscaled.

I am looking at the “sum” block in the simulink math library and have two questions regarding the mask.

1) How do I control the port placement on the mask icon? Using the circle sum feature I notice that the second port enters through the bottom. How is this done?

2) What is the appropreat “plot ()” instruction to draw a circle or an elipse?

Any help will be most welcome.

Regards

David

Thanks for the tip. Using your example I got this to work on my PC. My problem now is trying to get the s-function to compile to an xPC.

Thanks,
Jay

You can look at an example I made where I use a level 2 s-function to dynamically set the color of a block based on the value of a signal:

http://www.mathworks.com/matlabcentral/fileexchange/23127

It uses a level 2 M-file S-function. Using get_param and set_param, you can configure a lot of things in a running model, including mask value.

To begin, I suggest using get_param and the “objectparameters” property to see all available properties of block or model. Once you found what you are looking for, tune it using get_param.

It would also be possible to do that using an event listener… let me know if you would like to know more about event listener, I think it is another cool feature.

Guy

Is there a way to access the value of an inport in a mask to either display it or be able to use it in logic in a callback?

Thanks,
Jay

Is there a way to include a jpeg or even pdf image into the Mask Help box?
I tried it according to the Matlab help but it didn’t work out for me.
My goal is to write the entire help text including several pictures in another program and just save it as jpeg or pdf file.

I highly appreciate any help!
Thank you already in advance.

s.im = imread(’imagefile.jpg’);
set_param(blk,’UserData’,s)

Then, in the MaskInitialization

s = get_param(gcb,’UserData’)

And, in the mask code you should be able to call:

image(s.im)

Is there no way, you can permanently link it though? Somehow embed the image into the mask.