How to insert an element into matrix?
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Suppose I have a matrix A = ones(4,6). I want to combine it with a vector B = zeros(1,6) to make another matrix C of size 5 by 6, where the first four rows would be ones and fifth would be zero.
回答（2 个）
Image Analyst
2017-8-22
Here's code to do both inserting (like your subject line) and appending (like your message body):
A = ones(4,6)
B = zeros(1,6)
% To append / concatenate:
C = [A; B]
% To insert into a specified row number:
rowToInsert = 3 % Whatever you want.
C = [A(1:rowToInsert-1, :); B; A(rowToInsert:end, :)]
4 个评论
Nitesh khanna
2020-7-17
how to get variables with suffix , in matrix for..as following
x1 y1 txy1
x2 y2 txy2
x3 y3 txy3
x4 y4 txy4
Image Analyst
2020-7-17
I don't know what you mean. What suffix? Do you have scalar variables with those names and want to build a matrix from them? Like
M = [...
x1 y1 txy1;
x2 y2 txy2;
x3 y3 txy3;
x4 y4 txy4]
Amay Gupta
2020-10-14
can the first one be used in loops?
if yes please explain.
Image Analyst
2020-10-14
What is "the first one"? Please explain. Why do you want loops?
result = [A;B]
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2017-8-22
2020-10-14
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