I assume there is some data tht you are posting to a channel that you want to reference somewhere else. If that is incorrect, can you provide more info on what is your final goal?
Use a react or timeControl to trigger MATLAB analysis that writes data to a field. Use thingSpeakWrite() in your MATLAB analysis for example. Then when you read that field,
If your data is numeric and you can display it in a plot, you can use the to embed your plot in a page (raw html) and set the plot to dynamic with a refresh rate where you want it. See embed a plot. 'update' is the time in seconds to refresh the plot.