# Create a loop with decrementing step

2 ビュー (過去 30 日間)
Dennis M 2021 年 8 月 25 日
コメント済み: Dennis M 2021 年 9 月 2 日
Good Day, May I ask a question, how can I create loop that the output is like this (10 20 29 38 47 56 65 and so on) and (80 70 61 53 46 40 35 and so on) same in negative (-10 -20 -29 -38 -47 -56 -65 and so on) and (-80 -70 -61 -53 -46 -40 -35 and so on)
Thanks

サインインしてコメントする。

### 採用された回答

the cyclist 2021 年 8 月 25 日
Do you mean that you want the increment to be 10, 9, 8, ...? (That is not what your first example does). Here is one way to do a series like that. I hope you can generalize to what you need.
inc = 10:-1:1;
step = cumsum(inc)
step = 1×11
10 19 27 34 40 45 49 52 54 55 55
##### 6 件のコメント表示非表示 5 件の古いコメント
Dennis M 2021 年 9 月 2 日
Good Day,
Sir The Cyclist,
Here's my script please check if there's improvement, thanks
clear all
format compact
finalstep = 0.125;
%%
starta = 20;
stopa = 30;
hysa = abs(stopa - starta);
stastep = hysa * 0.2;
stepa = linspace(finalstep,stastep,hysa);
A = stopa - cumsum([0 stepa]);
A = A(A >= starta);
intermediatesa = flipud(A.').';
for loop_variablea = intermediatesa
%body of the loop goes here
a = loop_variablea
end
%%
startb = 15;
stopb = 5;
hysb = abs(stopb - startb);
stastep = hysb * 0.2;
stepb = linspace(finalstep,stastep,hysb);
B = stopb + cumsum([0 stepb]);
B = B( B <= startb);
intermediatesb = flipud(B.').';
for loop_variableb = intermediatesb
%body of the loop goes here
b = loop_variableb
end
%%
startx = -20;
stopx = -30;
hysx = abs(stopx - startx);
stastep = hysx * 0.2;
stepx = linspace(finalstep,stastep,hysx);
X = stopx + cumsum([0 stepx]);
X = X(X <= startx);
intermediatesx = flipud(X.').';
for loop_variablex = intermediatesx
%body of the loop goes here
x = loop_variablex
end
%%
starty = -15;
stopy = -5;
hysy = abs(stopy - starty);
stastep = hysy * 0.2; % start step
stepy = linspace(finalstep,stastep,hysy);
Y = stopy - cumsum([0 stepy]);
Y = Y(Y >= starty);
intermediatesy = flipud(Y.').';
for loop_variabley = intermediatesy
%body of the loop goes here
y = loop_variabley
end

サインインしてコメントする。

### カテゴリ

Find more on Model Predictive Control Toolbox in Help Center and File Exchange

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by