How to smooth multiple datasets in app Designer with one slider

Hello everyone, please I need help with smoothing imported data in App Designer interactively.

I have 4 datasets and 4 seperate buttons to plot them one dataset per time on one axis.

data1

data2

data3

data4

Now I want to make a custom slider that smoothens each plotted data showing on the axes but I'm not quite sure how to do that.

smootheddata1=smooth(app.data1,changingValue)
            hold(app.UIAxes, 'on')
            plot(app.UIAxes, data1, smootheddata)
                     hold(app.UIAxes, 'off  ')
                     
                    

I saw that this code above is used to smooth a particular data series but how do I do that for every plotted dataset using one slider. I want the slider to perform smoothing for any plotted data using the data1, data2, data3 or data4 buttons

Thanks in advance

Answer 1

[TADA]

If I understand correctly this time, you have 4 datasets, you want to plot one of them and you want to control the smoothing with the slider. correct?

save all your datasets in a list (cell array if the sizes are prone to change which is quite likely, or they are tables or whatever), and keep a separate property which tells you the index of current plotted dataset.

Then when you choose to plot this dataset or the other you update the currentPlottedDataSetIndex property and plot.

The slider should have a callback function which also plots argain.

when plotting you take the desired dataset from the list (using the index saved in the currentPlottedDataSetIndex property), apply smoothing then plot it.

The example I posted last time still holds but the datasets should be handled as a list.

[Daniel Abraham]

Hi Thank you for your feedback.I'm quite sure your advice is useful because the logic makes sense although since I'm new to MATLAB I'm finding it difficultnto implement it. You said I should save currentPlottedDataSetIndex as a property but how do I equate this or assign this to the what is currently plotted. Could you please show an example with the code?

[TADA]

It is all fairly simple

I updated the example from last time, I made it a crude example without using any fancy good coding practices. still it should help you solve your problem

[TADA]

This example generates the data in the button callback functions. The data is generated as a matrix with two columns, the first one being X axis values and the second Y axis values, and adds some random noise for you to smooth.

You can obviously change the workings of the button callback functions to load data from file or whatever it is you are trying to do.

Naturally, you will need to update the function extracting X and Y values from the current dataset as well.

[Daniel Abraham]

Thanks @TADA, Did you try running the app, it seems to have problems with the fuctions gausmf and doplot, I downloaded the curve fitting toolbox and tested it but still no luck.

[TADA]

Daniel, I can run it on my system.

I think gaussmf is part of the fuzzy logic toolbox, but you can just replace it with any other calculation for the sake of this example:

            x = linspace(0, 3.5);
            y = 2*exp(x) + 10*rand(1, length(x)) - 5;