Getting Coordinate input from user
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I want to get several point 2d coordinates from the user and store the x and y coordinates in separate arrays. I'm using a for loop to do it but it doesn't assign the input to the variables, here's how I'm doing it:
for i=1:5
[x(i),y(i)]=input('Coordinates of Node')
end
3 个评论
Jan
2018-10-16
it doesn't assign the input to the variables
Please do not explain, what the code does not do, but mention, what the code does do. An exact description contains a hint of the way to solve the problem usually.
Morteza Ghafoori
2018-10-16
Jan
2018-10-16
Please post a complete copy of the message in the forum. You see, that the message explains the problem already.
采纳的回答
Jan
2018-10-16
According to the documentation, |input< has 1 output only:
help input
doc input
Then:
x = zeros(1, 5); % Pre-allocation
y = zeros(1, 5);
for i = 1:5
reply = input('Coordinates of Node')
x(i) = reply(1);
y(i) = reply(2);
end
The pre-allocation is not essential here, because waiting for the user input will take much more time than expanding the arrays x and y. But it is a good programming practice.
3 个评论
Morteza Ghafoori
2018-10-16
Jan
2018-10-16
In a separate line? What did you try to get this impression? Maybe you want this:
for i = 1:5
reply = input(sprintf('Coordinates of Node %d: ', i), 's');
num = sscanf(reply, '%g %g');
x(i) = num(1);
y(i) = num(2);
end
Morteza Ghafoori
2018-10-19
编辑：Morteza Ghafoori
2018-10-19
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