# Entering A Number In N, Then Enter Numbers N Times

Best Answer Sheepolution , 30 October 2014 - 12:33 AM

"How many rows"?->N

For 1->I to N

"X"?->Matrix A[I,1]

"Y"?->Matrix A[I,2]

Next

Something like this?

I think you need to define the length of the matrix before hand, but I forgot how to do that at the moment.

Something like N->Dim Mat A

I think.

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8 replies to this topic

### #1 jasonphan

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Posted 30 October 2014 - 12:10 AM

I want to make a program to ask the user to input a number (lets say N) and then based on N, the user enters numbers, coordinates, or a list N times

Input example:

4

0,0

0,2

2,2

2,0

"How many rows"?->N

For 1->I to N

"X"?->Matrix A[I,1]

"Y"?->Matrix A[I,2]

Next

Mat [A]    //Not necessary, just a display test

Thanks!

Edited by jasonphan, 02 December 2014 - 07:38 AM.

### #2 Sheepolution

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Posted 30 October 2014 - 12:33 AM   Best Answer

"How many rows"?->N

For 1->I to N

"X"?->Matrix A[I,1]

"Y"?->Matrix A[I,2]

Next

Something like this?

I think you need to define the length of the matrix before hand, but I forgot how to do that at the moment.

Something like N->Dim Mat A

I think.

Edited by Sheepolution, 05 November 2014 - 06:53 PM.

• jasonphan and Ata.H.D like this

### #3 jasonphan

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Posted 30 October 2014 - 04:28 AM

Your code provided what I was asking for and gave me some good insight on how to program matrices.

I'm not quite sure what the second for loop did as the last value I entered was displayed as a single value, however the inputs were saved into the matrix correctly

As for the dimensions of the matrix, I can input the size of them before hand, but I will play around with the calculator to see if I can program the size

I will update my current code

Thank you Sheepolution

Edited by jasonphan, 30 October 2014 - 04:32 AM.

### #4 Sheepolution

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Posted 30 October 2014 - 07:40 PM

The second loop was to show the results. But I see now that you edited your post and cut out that request.

Glad to help, and good luck.

### #5 Krtyski

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Posted 31 October 2014 - 12:46 PM

Hello

If you want to define 3 x 3 Matrix A,

[[0,0,0][0,0,0][0,0,0]] -> Mat A

Does it help?

### #6 flyingfisch

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Posted 31 October 2014 - 02:32 PM

If this thread is solved, click the "mark solved" button under the best answer.

### #7 jasonphan

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Posted 31 October 2014 - 04:42 PM

@Krtyski, that's not quite what I was looking for, but I did figure out how to define the matrix rows based on the input N

"How many rows"?->N

{N,2}->Dim Mat A

for loop...

@flyingfisch, I don't see the "marked solved" button

### #8 flyingfisch

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Posted 01 November 2014 - 02:26 AM

Should be under any posts in threads you started that are not your own...

### #9 2072

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Posted 03 November 2014 - 09:15 AM

@flyingfisch, I don't see the "marked solved" button

There was a misconfiguration on this particular forum, you should see the 'mark Solved' button now

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