i have a matrix A of 1 column and another B of 4 columns. need to do some operations of A with each column of B and to get answer as C1,C2,C3,C4 using loops . Is it possible?
1 次查看(过去 30 天)
显示 更早的评论
i have a matrix A of 1 column and another B of 4 columns. need to do some operations of A with each column of B and to get answer as C1,C2,C3,C4 using loops . Is it possible?
0 个评论
采纳的回答
Image Analyst
2015-9-19
Perhaps this, which will do a fit of each column of (the badly-named) B vs. A:
% A is the x values,
% Columns of B are the y values
for col = 1 : size(B, 2)
thisColumn = B(:, col);
% Fit a line through these data points in this column.
coefficients = polyfit(A, thisColumn, 1);
slopes(col) = coefficients(1);
intercepts(col) = coefficients(2);
end
0 个评论
更多回答(1 个)
Stephen23
2015-9-17
编辑:Stephen23
2015-9-17
The best solution would be to not create numbered variables, but to simply keep all of the data together in one numeric array. Doing this makes MATLAB code much faster and neater. You can simply use indexing to access that parts of that array than you need to.
If you tell us what those "operations" are then we could tell you effective and efficient ways of doing those operations.
Whatever you do you should not create those variables dynamically. This is a poor programming practice that beginners seem to love. Read this to know why creating variables dynamically is a really bad idea:
3 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!