这个程序我设置了条件,在x=53.7之后的Y值为0,但是计算出来的结果x从10-63,Y都有结果,请问为什么呢?
```c++
clear;
clc;
x=10:0.1:63.45842269
a=[]
for x1=x
if (10<=x1<=53.73870947)
y11=-1.824e-5*x1.^3+0.05575*x1.^2-0.1125*x1-4.432;
else
y11=0;
end
a=[a,y11]
end
plot(x,a)
```
这个程序我设置了条件,在x=53.7之后的Y值为0,但是计算出来的结果x从10-63,Y都有结果,请问为什么呢?
```c++
clear;
clc;
x=10:0.1:63.45842269
a=[]
for x1=x
if (10<=x1<=53.73870947)
y11=-1.824e-5*x1.^3+0.05575*x1.^2-0.1125*x1-4.432;
else
y11=0;
end
a=[a,y11]
end
plot(x,a)
```
clear;
clc;
x =10:0.1:63.45842269
a =[]
for x1=x
if (10<=x1)&&(x1<=53.73870947)
y11=-1.824e-5*x1.^3+0.05575*x1.^2-0.1125*x1-4.432;
else
y11=0;
end
a = [a,y11]
end
plot(x,a)
有用请采纳,谢谢