# How to construct array with certain slope ?

2 views (last 30 days)
NIKHIL on 4 May 2021
Commented: Paul Hoffrichter on 15 May 2021
Dear Team,
I have a signal :
Signal = [ 0,10, 0, 10, 0, 10, -50, -10,-50,-10,-50, 30, 20, 30, 20] ;
Signal is y-axis values and i want to define x-axes values based on slope of incline and decline.
incline & decline slope to be 10%.
I would like to first scale the x-axes then interpolate 10 points in between them.
I want to plot such that its incline and declipne slope is 10 or any other user defined value ?
Can you please support in getting that slope part in signal ?
Paul Hoffrichter on 5 May 2021
>> 0 to 10 it will take 1 secs
Sounds like 10 means 10 seconds, but elsewhere you refer to 10%. I still do not understand what the plot should look like. Are you looking to rotate the plot or just scale the x-axis.
Maybe clarify exactly what the axis should look like as a first step.

Paul Hoffrichter on 5 May 2021
Paul Hoffrichter on 15 May 2021
NIKHIL,
Since the values of 't' in previous post is what you can use, here is a formulation of how to get those values.
Signal = [ 0,10, 0, 10, 0, 10, -50, -10,-50,-10,-50, 30, 20, 30, 20] ;
difSig = [0 diff(Signal)/10];
t = zeros(1, length(difSig));
for ii = 2:length(t)
if difSig(ii) < 0
t(ii) = t(ii-1) + 1;
else
t(ii) = difSig(ii) + t(ii-1);
end
end
plot(t,Signal), axis tight, grid on, grid minor
Hope this helps.

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