Why I knock into a error when I want to get data from my double?

Question

晨 2023-9-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2027539-why-i-knock-into-a-error-when-i-want-to-get-data-from-my-double

编辑： Walter Roberson 2023-10-3

R = [[1 0.9954 0.9994 0.9989];
    [0.9954 1 0.9926 0.9923];
    [0.9994 0.9926 1 0.9977] ;
    [0.9989 0.9923 0.9977 1]];
% 一级偏相关系数
R_PC1 = [PC1(1,2,3) PC1(1,2,4) PC1(1,3,2) PC1(1,3,4) PC1(1,4,2) PC1(1,4,3)
    PC1(2,3,1) PC1(2,3,4) PC1(2,4,1) PC1(2,4,3) PC1(3,4,1) PC1(3,4,2)];
Incorrect number or types of inputs or outputs for function R.

Error in solution>PC1 (line 12)
r = (R(a,b)-R(a,c)*R(b,c))/sqrt((1-R(a,c)^2)*(1-R(b,c)^2));
% 二级偏相关系数
R_PC2 = [PC2(1,2,3,4) PC2(1,3,2,4) PC2(1,4,2,3) PC2(2,3,1,4) PC2(2,4,1,3) PC2(3,4,1,2)];
% 计算一级偏相关系数
function[r] = PC1(a,b,c)  % 在c不变的情况下，a和b之间的相关系数
r = (R(a,b)-R(a,c)*R(b,c))/sqrt((1-R(a,c)^2)*(1-R(b,c)^2));
end
function[r] = PC2(a,b,c,d) %在c,d不变的情况下，a和b之间的相关系数
r = (PC1(a,b,c)-PC1(a,d,c)*PC1(b,d,c))/sqrt((1-PC1(a,d,c)^2)*(1-PC1(b,d,c)^2));
end

This program knock into a error at line15 and it read'出错 coord>PC1 (第 15 行)'

检查对函数 'R' 的调用中是否存在不正确的参数数据类型或缺少参数。

It seems that MATLAB see the 'R' as a function rather than a Matrix

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Answer 1

Star Strider 2023-9-30

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2027539-why-i-knock-into-a-error-when-i-want-to-get-data-from-my-double#answer_1322669

在 MATLAB Online 中打开

In ‘PCI1’ you are referencing ‘R’ however you are not passing it to ‘PCI1’ as an argument.

Perhaps this —

R = [[1 0.9954 0.9994 0.9989];
    [0.9954 1 0.9926 0.9923];
    [0.9994 0.9926 1 0.9977] ;
    [0.9989 0.9923 0.9977 1]];
% 一级偏相关系数
R_PC1 = [PC1(1,2,3,R) PC1(1,2,4,R) PC1(1,3,2,R) PC1(1,3,4,R) PC1(1,4,2,R) PC1(1,4,3,R)
    PC1(2,3,1,R) PC1(2,3,4,R) PC1(2,4,1,R) PC1(2,4,3,R) PC1(3,4,1,R) PC1(3,4,2,R)]
R_PC1 = 2×6
    0.8073    0.7217    0.9770    0.8801    0.9409    0.7661
   -0.6638    0.3076   -0.4463    0.2409   -0.3698    0.8473
% 二级偏相关系数
R_PC2 = [PC2(1,2,3,4,R) PC2(1,3,2,4,R) PC2(1,4,2,3,R) PC2(2,3,1,4,R) PC2(2,4,1,3,R) PC2(3,4,1,2,R)]
R_PC2 = 1×6
    0.9984    0.9992    0.9981   -0.9969   -0.9956   -0.9953
% 计算一级偏相关系数
function [r] = PC1(a,b,c,R)  % 在c不变的情况下，a和b之间的相关系数
   r = (R(a,b)-R(a,c)*R(b,c))/sqrt((1-R(a,c)^2)*(1-R(b,c)^2));
end
function [r] = PC2(a,b,c,d,R) %在c,d不变的情况下，a和b之间的相关系数
    r = (PC1(a,b,c,R)-PC1(a,d,c,R)*PC1(b,d,c,R))/sqrt((1-PC1(a,d,c,R)^2)*(1-PC1(b,d,c,R)^2));
end