MATLAB: How to output the maximum value of a signal to a display

simulink

Is there anyway to output the maximum value of a signal that varies with time in simulink to a display block?

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I think you should be able to compute the running maximum using the MinMax Running Resettable block and connect its output to a display block. Make sure that the "Initial condition" is appropriately set for your context.

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MATLAB: Simulink

The MinMax Running Resettable block outputs the minimum/maximum of a signal over time - you can use the Demux block to split your signal and provide only the amplitude as the input to the MinMax block. However, since you need to get the time corresponding to that maximum, I would recommend using the time part of your signal as input to a Triggered Subsystem - the subsystem will simply connect the output to the input (this is the default content of the block when you drag it in from the library). Setup the Trigger type to "both" (rising and falling), and use the output of the MinMax Running block as input to the trigger port. This will ensure that the output of the Triggered Subsystem will be updated only when the output of the MinMax block changes.

MATLAB: Won’t this display

Well, you're creating a variable a, a variable b, and a function lrgn but never do anything with them such as calling the function with your a and b variable.

So possibly, you meant to do:

a = ...
b = ...
lrng(b, a)   %actually call the function!
function [x] = ...

Note that it's only in recent versions of matlab that you can define a function in a script. In earlier versions, your function would have had to be in a separate file, making more obvious that you never do anything with it.

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MATLAB: Simulink

MATLAB: Won’t this display

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