how to store a value in the next row?

Question

VENGATESAN S 2020-9-3

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/588394-how-to-store-a-value-in-the-next-row

编辑： Stephen23 2020-9-4

i want to extract the coordinates for a squar plate having length of 1m. i want to divide into 25 smaller square whose lenth is 0.2. so that i will get an array of (25,2).

x1=0; x2=1;

y1=0; y2=1;

del=0.2;

step=zeros(25,2);

for y=y1:del:y2;

for x=x1:del:x2;

step=[x y]

end

what i am getting from this program is

step =

0 0

step =

0.2000 0

step =

.4000 0

step =

0.6000 0

.............................

step =

1 1

what im actually want is

step= 0 0

0 0.2

0 0.4

. .

1 1

i want to store the value in the next row for the next loop.

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Answer 1

Stephen23 2020-9-3

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/588394-how-to-store-a-value-in-the-next-row#answer_489079

编辑：Stephen23 2020-9-3

在 MATLAB Online 中打开

The MATLAB approach:

>> [X,Y] = ndgrid(0:0.2:1);
>> M = [Y(:),X(:)]
M =
00000   0.00000
00000   0.20000
00000   0.40000
00000   0.60000
00000   0.80000
00000   1.00000
20000   0.00000
20000   0.20000
20000   0.40000
20000   0.60000
20000   0.80000
20000   1.00000
40000   0.00000
40000   0.20000
40000   0.40000
40000   0.60000
40000   0.80000
40000   1.00000
60000   0.00000
60000   0.20000
60000   0.40000
60000   0.60000
60000   0.80000
60000   1.00000
80000   0.00000
80000   0.20000
80000   0.40000
80000   0.60000
80000   0.80000
80000   1.00000
00000   0.00000
00000   0.20000
00000   0.40000
00000   0.60000
00000   0.80000
00000   1.00000

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Stephen23 2020-9-4

编辑：Stephen23 2020-9-4

在 MATLAB Online 中打开

"but it shows ...Error: Invalid use of operator."

Lets have a look:

>> [X,Y] = ndgrid(0:0.2:1);
>> M = [Y(:),X(:)] % my code (no spaces, no error)
M =
         0         0
         0    0.2000
... more lines here
    1.0000    0.6000
    1.0000    0.8000
    1.0000    1.0000
>> M = [Y (:),X (:)] % your code (add spaces -> error)
 M = [Y (:),X (:)]
         ↑
Error: Unexpected MATLAB operator.
 
>>