selecting an element of a vector

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PJS KUMAR
PJS KUMAR 2018-10-23
回答： PJS KUMAR 2018-10-25
How to select an element of a vector which is nearest to the given value xp.
Suppose we have a vector
x=[1 1.05 1.1 1.15 1.2 1.25]
a) if xp=1.18, the output should be 1.2 (which is nearest to 1.18)
b) if xp=1.12, the output should be 1.1 (which is nearest to 1.12)
  2 个评论
madhan ravi
madhan ravi 2018-10-23
编辑：madhan ravi 2018-10-23
b) if xp=1.12, the output should be 1.1 (which is nearest to 1.12)
nearest to 1.12 is 1.15 ?? not 1.1 , whats the logic behind it ,explain to understand
PJS KUMAR
PJS KUMAR 2018-10-23
1.1 is nearest to 1.12 than 1.15

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KALYAN ACHARJYA
KALYAN ACHARJYA 2018-10-23
编辑：KALYAN ACHARJYA 2018-10-23
x=[1 1.05 1.1 1.15 1.2 1.25];
xp=input('Enter the xp value: ');
[d, idx]=min(abs(x-xp));
fprintf('The output is%.2f',x(idx));
Command Window
Enter the xp value: 1.18
The output is1.20
  2 个评论
KALYAN ACHARJYA
KALYAN ACHARJYA 2018-10-23
编辑：KALYAN ACHARJYA 2018-10-23
idx is giving the index position of x, which is close to xp
if idx=1, that means x(idx)=x(1)=1 (First element)
d gives the minimum difference of x-xp, abs absolute value (+ve)

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更多回答（1 个）

PJS KUMAR
PJS KUMAR 2018-10-25
How to select an element of a vector which is previous to the given value xp.
Suppose we have a vector
x=[1 1.05 1.1 1.15 1.2 1.25]
a) if xp=1.18, the output should be 1.15 (which is previous to 1.18)
b) if xp=1.12, the output should be 1.1 (which is previous to 1.12)

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