Adjusting data points that fit a criteria

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Matt
Matt 2012-12-6
Basically for some points say
x = 1:1:100; y = x;
plot(x,y);
how can i for example add 1 for x values between 10 and 20.
i tried
if x >10 & x <20;
x1 = x+1;
end
plot(x1,y)
but it doesnt seem to make a variable, but i dont get an error either

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Wayne King
Wayne King 2012-12-6
编辑：Wayne King 2012-12-6
x = 1:1:100; y = x;
x(x>10 & x<20) = x(x>10 & x<20)+1;
plot(x,y)
If you want a new variable
x1 = x;
x1(x1>10 & x1<20) = x1(x1>10 & x1<20)+1;
plot(x1,y)

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