How do I create a square matrix based on user input?

I'm trying to write a program that asks the user what the dimensions of their square matrix are then takes that number, asks for each entry and creates the matrix for the program to use for the rest of the questions. I know how to create one row at a time, but I can't figure out how to put all the rows together to make one matrix.

[Akash h.r]

m=input('row')
n=input('column')
for i=1:m
    for j=1:n
        a(i,j)=input('elements-')
    end
end
a=reshape(a,m,n)

Answer 1

[Azzi Abdelmalek]

   M=[row1;row2;row3]

[Erin]

But how do I write a program that reads a matrix that I prompt someone to enter? I'm pretty sure I have to do it one component at a time, I just can't figure out how to put them in the right places. My code looks like this:

C=input('How many columns are there in P?  ');
    R=input('How many rows are there in P?  ');
    P=zeros(R:C);
    co=1; 
    ro=1;

          while co<=C && ro<=R;
              if co==1
                  P(co)=input('What is the first value of this column of P? ')
                  co=co+1;
              elseif co>1
                  P(co)=input('What is the next value of this column of P?  ')
                  co=co+1;
              end
              ro=ro+1;
          end 

      P=P(R:C)

and the output looks like:

How many columns are there in P?  2
How many rows are there in P?  2
What is the first value of this row of P? .2

P =

      0.2000         0
           0         0

What is the next value of this row of P?  .2

P =

      0.2000         0
      0.2000         0

P =

      0.2000

Answer 2

[Anuj]

One simple way for this can be, Suppose you have square matrix of order n. So you have n^2 elements. You can enter all the elements one by one and change it into square matrix like this-

    n=input('order of your square matrix is? ')
    for i=1:n^2;
    a(i)=input('elements-');
    end
    a=reshape(a,n,n)'

Regards

Answer 3

[unknown nobody]

 a = input('enter the matrix');

[1 2; 3 4]

Answer 4

[Akash h.r]

 m=input('row')
n=input('column')
for i=1:m
for j=1:n
a(i,j)=input('elements-')
end
end
a=reshape(a,m,n)

Answer 5

[Bhupendra Raj Acharya]

m=input('row')
n=input('column')
for i=1:m
for j=1:n
a(i,j)=input('elements-')
end
end
a=reshape(a,m,n)

[Josipa Petricevic]

what I have to write in command window instead a(i,j)=input('elements-')?

[Walter Roberson]

The above code is valid in the command window -- though I would recommend putting in extra spaces,

m=input('row ')
n=input('column ')
for i=1:m
for j=1:n
a(i,j)=input('elements- ')
end
end
a=reshape(a,m,n)

Answer 6

[Amjad Alotaibi]

 m=input('row')
n=input('column')
for i=1:m
for j=1:n
a(i,j)=input('elements-')
end
end
a=reshape(a,m,n)

[tbaracu]

Can be read all the elements from the keyboard without to press ENTER after each element ? Lets say, I input direcctly with spaces from the keyboard 1 2 5 7, and the effect should be the matrix [ 1 2 ; 5 7] . Which is the procedure ?

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/111358-input-function-to-enter-array-elements#comment_1268885

Answer 7

[Lam Nguyen Van]

help me. I want to input symbols matrix. ex: [a b c; f a h]

[Mehedi Hasan]

How to take matrix from user. Calculate the mean, variance, covariance and standard

deviation for that matrix. Draw the histogram graph.