How to solve matrix dimension must agree error in the following program.

1 次查看（过去 30 天）
PRASHIK GAIKWAD
PRASHIK GAIKWAD 2018-9-28
编辑： Basil C. 2018-9-28
d = 100;
r = mod(a,b);
for a = 2:1:d
c = 0;
for b = 1:1:a
if r == 0
c = c+1;
end
end
if c == 2
fprintf('value of a = %d',b,c,d)
end
end
  3 个评论
显示 1更早的评论
PRASHIK GAIKWAD
PRASHIK GAIKWAD 2018-9-28
d = 100 and a = 2:1:d and b = 1:1:a c = 0 and if a/b = 0,then c = c+1,when c=2 then print value of a. That's the program I am trying to run.But I am getting an error saying Matrix dimension must agree
madhan ravi
madhan ravi 2018-9-28
you have defined a and b after using those variables?
>> d = 100;
r = mod(a,b);
for a = 2:1:d
c = 0;
for b = 1:1:a
if r == 0
c = c+1;
end
end
if c == 2
fprintf('value of a = %d',b,c,d)
end
end
Undefined function or variable 'b'.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Basil C.
Basil C. 2018-9-28
编辑：Basil C. 2018-9-28
Hi, according to what you stated in the comment there are a few mistakes i would like to points out
1. when b=1:1:a you only limit the value of b to be equal to [1,2] as it considers a to be a(1)
2. mod(a,b) requires the size of a and b to be the same which is clearly not since a has a size of 99 while b has only 2 elelments
Guessing from the code it seems like you are trying to write a code for generating prime numbers. Then I feel this is what you are looking for
d = 100;
a = 2:1:d ;
c = 0 ;
for a = 2:1:d
c = 0;
for b = 1:1:a
r = mod(a,b);
if r == 0
c = c+1;
end
end
if c == 2
disp(['The value of a is = ',num2str(b)]);
end
end

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Resizing and Reshaping Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by