Need to map values to 0:1 scale for efficiencies..... Help?!

Folks,

Basically I am modeling the affects of altitude on Wind turbines, ICE, and micro turbines. I have all the math done,and I have a 1x17 matrix of values for each power source. So if elevation is my X axis I was efficiency to be my Y axis. However the output values from the 3 different sources vary by several powers of 10. I basically want to standardize each of the 1x17 matricies to new 1x17 matrix of values ranging from 0 to 1 that correspond to the original values. This way I can graph all 3 on one graph against altitude.

I hope this makes sense, and someone can help.

thanks. Maksim

Answer 1

[Matt Fig]

Why not use:

semilogy

to plot the efficiencies if they vary by orders of magnitude?

[Maksim Vakulenko]

I tried this, however it seems to only graph one of the 3, and gives the code that negative values are ignored.

[Matt Fig]

How did you call the function? And how can efficiency be negative?

x = 1:17;  % Altitudes
y1 = rand(1,17)*10^-4;  % Efficiencies differ 
y2 = rand(1,17)*10^-2;  % By orders of magnitude.
y3 = rand(1,17);
semilogy(x,y1,x,y2,x,y3)

Answer 2

[Maksim Vakulenko]

I figured out what I am going to do. I find the max value of each matrix, then I divide each value by the max to get a max value of 1. Works well.