Get a user to input corordinates to form a matrix.

Hi I have the matrix;

points = [2 5; 6 9; 7 8; 9 10; 6 10]

I want to make it that the user inputs the points and a subsequent matrix is created. I think if I make a 2 x n matrix of zeros and get the user to input how many coordinates there is. But then I am stuck on how to ask the user to enter the coordinates. Could I use matrix manipulation with the input function to ask for the x and y values etc?

NOTE: These points are x and y coordinates i.e. 2 5 the x coordinate is 2 and the y coordinate is 5. I was also thinking maybe I could load a csv file and have the user specify the points in a table. I would prefer the aforementioned method if possible.

Thanks,

Answer 1

[Azzi Abdelmalek]

You can try this

x=input('enter x coordinates between square bracket, like [1 2 3] ')
y=input('enter y coordinates between square bracket, like [1 2 3] ')

You can also use inpudlg

n=10; % number of lines
a= inputdlg('enter x coordinates','test',n)
x=str2num(a{1})
b= inputdlg('enter y coordinates','test',n)
y=str2num(a{1})

[Giuseppe]

I like the idea of inpudlg. Thanks.

Answer 2

[Mischa Kim]

Enter x- and y- coordinates, values separated by an empty space:

 prompt   = {'x-coor:','y-coor:'};
 name     = 'Input coordinates';
 numlines = 1;
 answer   = inputdlg(prompt,name,numlines)
 points   = [str2num(answer{1}); str2num(answer{2})]';

[Giuseppe]

I prefer the layout of this dialogue. How could I use that layout with this code so that there is only one dialogue?

n=10; % number of lines
a= inputdlg('enter x coordinates','test',n)
x=str2num(a{1})
b= inputdlg('enter y coordinates','test',n)
y=str2num(a{1})

Thanks.

[Azzi Abdelmalek]

n=3; % number of lines
ab= inputdlg('enter x and y coordinates','test',n)
xy=str2num(ab{1})