Re-sizing vectors?

I am working on a project that works with angles, and I have at my disposal a vector, that shows the angle elaborated and acquired from a sensor.

The only problem is that when I plot the vector, the y-axis has different values from the eulerian angle (see the image attached). I know which sample stands for the maximum angle and which sample stands for the minimum angle, but I can't find a way to " re-sizing" the vector by associating maximum and minimum angle and change all the samples variating within that range.

Does anyone have any suggestions on the code? Perhaps a function?

Thank you in advance for your time MatLAB community!!

Answer 1

[Ameer Hamza]

If you want to change the range of the y-values, you can do it by first normalizing and then denormalizing to your required range

x = [1xn signal]

xNormalized = (x-min(x))/(max(x)-min(x))
newMin = 0;
newMax = 90;  % new minimum and maximum value of the signal you want

xNew = xNormalized*(newMax - newMin) + newMin;

xNew will have same shape of x but varies from newMin to newMax.

[Vittorio Rossi]

Thank you so much! It works!

[Ameer Hamza]

You are welcome.

Answer 2

[Steven Lord]

When you call the plot function with one input argument, the X coordinates used for the plot are the indices. In this example, V(1) is plotted at x = 1, V(2) at x = 2, etc. I added the line and marker specification to make it easier to see the actual points plotted.

figure
V = 1:2:19;
plot(V, '-o') % X coordinates 1:10

If instead you wanted to plot V(1) at x = 0.5, V(2) at x = 1, V(3) at x = 1.5, etc. you need to specify the vector of x coordinates in your plot call like this:

figure
x = (1:10)./2;
V = 1:2:19;
plot(x, V, '-o') % X coordinates 0.5, 1.0, 1.5, etc.