How do i step from a bigger number to a smaller number ?

Question

Nuri Efe Tatli 2021-6-30

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https://ww2.mathworks.cn/matlabcentral/answers/868808-how-do-i-step-from-a-bigger-number-to-a-smaller-number

评论： Nuri Efe Tatli 2021-7-2

采纳的回答： Image Analyst

I want to create an array with two numbers like this;

Xprime = x1 : 0.01 : x2

but when i make x1 > x2 i get an empty array.

Is there a solution to this ?

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Answer 1

Image Analyst 2021-6-30

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In general, if you don't know what x1 and x2 are, and which one will be bigger, you can do

x1 = 3
x2 = 2
inc = 0.01;
xPrime = x1 : sign(x2-x1) * inc : x2

If you know how many steps you want between the two, you can use the linspace() function instead:

numSteps = 10;
xPrime = linspace(x1, x2, numSteps)

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Nuri Efe Tatli 2021-7-2

Thank you.

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Answer 2

Akshit Bagde 2021-6-30

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If you want to create a decrement array, you should use

Xprime = x1:-0.01:x2;

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Answer 3

KSSV 2021-6-30

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x = 2:-0.01:1
x = 1×101
    2.0000    1.9900    1.9800    1.9700    1.9600    1.9500    1.9400    1.9300    1.9200    1.9100    1.9000    1.8900    1.8800    1.8700    1.8600    1.8500    1.8400    1.8300    1.8200    1.8100    1.8000    1.7900    1.7800    1.7700    1.7600    1.7500    1.7400    1.7300    1.7200    1.7100