How to create a vector with elemts being the outputs of a function

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Grigorios Chatziandreou 2021-4-29

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https://ww2.mathworks.cn/matlabcentral/answers/816935-how-to-create-a-vector-with-elemts-being-the-outputs-of-a-function

评论： Matt J 2021-4-29

Hello, we are given the ready function 'floris' which gives out power and speed at a specific location. Speed output is a numeric value. I want to create a vector (or just a set of values) named 'speeds' that has as elements, all the different speeds for all the location. My final purpose is to plot x-location vs speed.

To take it to the next level, I would like to be able to do simultaneously the same for y location. If I could do a 3d plot of [x, y] location that gives the speed output would be ideal. Have no idea how to do this though. Height stays fixed at 0.3m. x has to go from 10m to 14.16m and y from -0.54m to +0.54m.

Any help would be much appreciated and thank you in advance

for x=10:0.02:14.160 
    location = [x 0 0.3];
    
    [power,speed]=floris(wind_speed,density,wind_direction,turbine_centre,yaw_angle,diameter,powercurve,location);
    
    speeds(1,x)=speed
end

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Answer 1

Matt J 2021-4-29

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https://ww2.mathworks.cn/matlabcentral/answers/816935-how-to-create-a-vector-with-elemts-being-the-outputs-of-a-function#answer_687925

编辑：Matt J 2021-4-29

在 MATLAB Online 中打开

One way,

fun=@(x) floris(wind_speed,density,wind_direction,...
         turbine_centre,yaw_angle,diameter,powercurve,[x 0 0.3]);
[power,speed]=arrayfun(fun, 10:0.02:14.160);
    

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Grigorios Chatziandreou 2021-4-29

hey, i tried it but did not seem to work

Matt J 2021-4-29

在 MATLAB Online 中打开

Here is a simpler, made-up example, just to illustrate what should happen:

fun=@(x) deal( sum([x,0,0.3]) , mean([x,0,0.3])) ;
 
[power,speed]=arrayfun(fun, 10:0.02:14.160);
whos power speed
  Name       Size             Bytes  Class     Attributes

  power      1x209             1672  double              
  speed      1x209             1672  double              