循环 Matlab 的数组 [关闭]

Question

function f = lowpassFIR(sample)

%Calculates Finite Impulse Response low pass filter coefficient
%using the windowing methods as well

passEdge = 100;
StopbandAtt = 20;
passbandRip =.05;
transWidth = 10;
Fs = sample;





%Step One: select number of coefficients%
deltaF = transWidth/Fs;

%Normalize for each window


rectN = round(0.9/deltaF);
hannN = round(3.1/deltaF);
hammN = round(3.3/deltaF);
blackN = round(5.5/deltaF);


rectPos = rectN/2;
rectNeg = (rectPos*-1);


%For the Vector Array
%rect = rectNeg:rectPos;

deltaSum= passEdge + (transWidth/2);
deltaF2= deltaSum/Fs;

for i = [rectPos:rectNeg]

   %iterate through each value and plug into function in for loop
   %each output of the function will be stored into another array
f= 2*i;
end





end

我已对其进行了编辑，并认为这会起作用，但我收到了错误...

lowpassFIR 中的错​​误（第 6 行） passEdge = 100;

在调用期间未分配输出参数“f”（可能还有其他参数） “/Users/sergiogonzalez-palavicini/Documents/MATLAB/lowpassFIR.m>lowpassFIR”。

Answer 1

您可以使用arrayfun:

>>> function a = func(b)
> a = b*2;
> end
>>> arrayfun(@func,1:10)
ans =

    2    4    6    8   10   12   14   16   18   20

>>>

它的第一个参数是一个函数，第二个参数是一个数组。
它返回另一个数组，并将函数应用于原始数组的每个元素。
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