Question

我的MATLAB代码中有两个函数，我希望一个函数的输出用作另一个函数的输入。我该如何实现呢？

medianfilter1.m

代码是：

function ans = medianfilter(angstanding)
[m,n] = size(angstanding);
ans = zeros(m,n);
x = angstanding(:,1);
y = angstanding(:,2);
z = angstanding(:,3);
svm = angstanding(:,4);

ans(:,1) = medfilt1(x);
ans(:,2) = medfilt1(y);
ans(:,3) = medfilt1(z);
ans(:,4) = medfilt1(svm);

第二个功能是：windowing.m

代码：

function [wx,wy,wz,wsvm] = windowing(currentdata)


% i = 1;
% obseen = 128;

 [r,c] = size(currentdata);

%  display(r);
% while obseen <= r
%     i = i +1;
%     obseen = obseen + 64;
%     
%   
% end;
% display(i);
residue  = rem((r - 128),64);
rows = floor((r-128)/64);

rows = rows + 1;


 wx = zeros(rows,128);

 wy = zeros(rows,128);
 wz = zeros(rows,128);
 wsvm = zeros(rows,128);

vectorx = currentdata(:,1);
vectory = currentdata(:,2);
vectorz = currentdata(:,3);
vectorsvm = currentdata(:,4);

for i = 1:rows
    x = (64 * (i-1)) + 1;
    if i ~= rows
        lastj = 128;
    else 
        break ;
    end;

        for j = 1:lastj

                wx(i,j) = vectorx(x);
                wy(i,j) = vectory(x);
                wz(i,j) = vectorz(x);
                wsvm(i,j) = vectorsvm(x);
                x = x + 1;

        end;


end;

我希望将medianfilter.m的结果输入windowing.m。

以下是我尝试的内容：merge.m

function ans = medianfilter(rawdataset_train_acc)
[m,n] = size(rawdataset_train_acc);
ans = zeros(m,n);
x = rawdataset_train_acc(:,1);
y = rawdataset_train_acc(:,2);
z = rawdataset_train_acc(:,3);
svm =rawdataset_train_acc(:,4);

ans(:,1) = medfilt1(x);
ans(:,2) = medfilt1(y);
ans(:,3) = medfilt1(z);
ans(:,4) = medfilt1(svm);

function [wx,wy,wz,wsvm] = windowing(ans)


% i = 1;
% obseen = 128;

 [r,c] = size(ans);

%  display(r);
% while obseen <= r
%     i = i +1;
%     obseen = obseen + 64;
%     
%   
% end;
% display(i);
residue  = rem((r - 128),64);
rows = floor((r-128)/64);

rows = rows + 1;


 wx = zeros(rows,128);

 wy = zeros(rows,128);
 wz = zeros(rows,128);
 wsvm = zeros(rows,128);

vectorx = ans(:,1);
vectory = ans(:,2);
vectorz = ans(:,3);
vectorsvm = ans(:,4);

for i = 1:rows
    x = (64 * (i-1)) + 1;
    if i ~= rows
        lastj = 128;
    else 
        break ;
    end;

        for j = 1:lastj

                wx(i,j) = vectorx(x);
                wy(i,j) = vectory(x);
                wz(i,j) = vectorz(x);
                wsvm(i,j) = vectorsvm(x);
                x = x + 1;

        end;


end;

我在上面试过但没有达到我想要的效果。我怎么能这样做？

Answer 1

如果您有一个功能[output_a]=a(input)和一个功能[output_b] =b(input) 你可以简单地将它们堆叠起来，因为@zizy archer已经建议了。它看起来像这样：

sample_input=3;    
sample_ouput_var=a(b(sample_input));

该块的作用是将取样输入馈入b（），取b的输出并直接将其输入a。所以在伪代码中：

sample_input=3;
sample_outputb=b(sample_input):
sample_outputa=a(sample_output_b):

在你的特殊情况下，我会这样做

outa,outb, outc, outd =windowing(medianfilter(input))

如果你想合并两个功能区，我会得到第二个函数的输出和第一个函数的输入，所以在伪代码中这将是

function output1=examplefunc(input1):
      output1=input1*input1
end

和第二个功能

function output2=examplefunc2(input2):
     output2=input2+input2;
end

通过以下方式合并它们：

function outputmerged=merged_func(input1):
   output1=input1*input1;
   input2=output1;
   output_merged=input2+input2;
end

在您的代码示例中，它看起来像这样：

function [wx,wy,wz,wsvm] = medianfilter_windowing_merge(rawdataset_train_acc)
%input from medianfilter output from windowing
[m,n] = size(angstanding);
ans = zeros(m,n);
x = angstanding(:,1);
y = angstanding(:,2);
z = angstanding(:,3);
svm = angstanding(:,4);

ans(:,1) = medfilt1(x);
ans(:,2) = medfilt1(y);
ans(:,3) = medfilt1(z);
ans(:,4) = medfilt1(svm);

%here happens the handover from one function to the other everything above is from the medianfilter.m everything below is from windowing 
currentdata=ans

[r,c] = size(currentdata);


residue  = rem((r - 128),64);
rows = floor((r-128)/64);

rows = rows + 1;


 wx = zeros(rows,128);

 wy = zeros(rows,128);
 wz = zeros(rows,128);
 wsvm = zeros(rows,128);

vectorx = currentdata(:,1);
vectory = currentdata(:,2);
vectorz = currentdata(:,3);
vectorsvm = currentdata(:,4);

for i = 1:rows
    x = (64 * (i-1)) + 1;
    if i ~= rows
        lastj = 128;
    else 
        break ;
    end;

        for j = 1:lastj

                wx(i,j) = vectorx(x);
                wy(i,j) = vectory(x);
                wz(i,j) = vectorz(x);
                wsvm(i,j) = vectorsvm(x);
                x = x + 1;

        end;


end;

Answer 2

我不完全明白你在尝试什么。在我看来，你想要的确实是复合函数。

一旦你有了一个函数原型/定义，就必须调用它。

例如，如果你有计算立方体的函数和数字的平方（分别为cubeExample和squareExample），并且你想计算数字x的6次幂：

result = squareExample(cubeExample(x))

function r = squareExample(a)
    r = a*a;
end

function r = cubeExample(a)
    r = a*a*a;
end

另请注意，函数定义的名称是静音，这意味着您的名称并不重要。

在这种情况下会像

[wx,wy,wz,wsvm] = windowing(medianfilter(angstanding))

根据您的想法，假设窗口的输入格式与medianfilter的输出相同。

如何在MATLAB中合并两个函数？

2 个答案: