plz send me the answer

2012 3 26
5 个回答
更新时间：2026 8 16
46 次查看（30 天）

0 个投票

x=1:7
n=-3:3
need y[n]=x[2n+3] ?
plz send me the answer " fadi.sam@live.com "

回答（5 个）

Walter Roberson
Walter Roberson 2012-3-26

0 个投票

This is not possible in MATLAB, as MATLAB arrays cannot be indexed at negative numbers or 0, but you want to index y at -3, -2, -1, and 0, along with 1, 2, and 3.

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fadi rami
fadi rami 2012-3-26
YES WALTER I MEAN " the value when x=1 is -3 and when x=2 the value is -2 etc , and i need for this shape make scaling and shifting
Geoff
Geoff 2012-3-26

0 个投票

I think you mean this:
x = -3:3;
y = 2 * x + 3;
plot(x, y);

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fadi rami
fadi rami 2012-3-26
no man i mean " the value when x=1 is -3 and when x=2 the value is -2 etc , and i need for this shape make scaling and shifting
Geoff
Geoff 2012-3-26
So you mean:
x = 1:7;
y = -3:3;
Here, y is "the value when x=1 is -3... etc", and you access it like this: y(1)
Geoff
Geoff 2012-3-26
Alternatively, if you really did mean n = -3:3 and y = 2n + 3, then:
x = 1:7;
n = -3:3;
y = 2*n + 3;
Nourhan
Nourhan 2026-8-14，19:37
编辑：Nourhan 2026-8-14，20:58

0 个投票

MATLAB does not allow negative or zero indices. MATLAB array indexing must start at 1
atta
atta about 18 hours 前
编辑：atta about 18 hours 前

0 个投票

y[n]=x[2n+3]
with x=[1,2,3,4,5,6,7] and n=−3:3.

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fadi rami
fadi rami
2012-3-26

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Matt J
Matt J
about 20 hours 前

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