How to rotate array values around origin with another arrays value as angle.

Question

Isak Fagerjord 2020-11-6

回答： Amanpreetsingh Arora 2020-11-9

Hi!

My question is:

I have a Distance=[1x31 double], contains values from 0.07 to 0.3, which should be the distance from origin

And a VinkelPosMotorA=[1x31 double], the values in the arrays are different. VinkelPosMotorA contains some values between 0 to 360.

I want to plot Distance around origin(0,0) with degrees in VinkelPosMotorA with regards to the origin

I have tried the rotate function but it doesnt calculate for every value in VinkelPosMotorA

If done correctly i should end up with a plot that starts at a point and ends close to that point(0:360 degrees)

What i essentially want is to stretch an almost linear graph around (0,0) so i end up with something that looks like a square.

Thanks in advance!

Picture that probably explains what i mean better:

Answer 1

Amanpreetsingh Arora 2020-11-9

You can use “pol2cart” function to convert the data from polar coordinates to cartesian coordinates and then plot using “plot”.

For your example,

[X,Y]=pol2cart(VinkelPosMotorA*pi/180,Distance);
plot(X,Y)

The documentation for "pol2cart" can be found as follows: