if function for array

조회 수: 4 (최근 30일)
Josefina Ottitsch
Josefina Ottitsch 2019년 2월 13일
답변: dpb 2019년 2월 13일
Hello I have a programm, that looks something like this:
x=[52.23;52.45;56.32;55.48;56.32;53.39;55.53;53.67;57.89]
plot(x)
and now i would like my program to draw the dots of numbers 52 till 54 and 54 till 56 and 56 till 58 in seperate graphs, how do i do this? i wanted to solve this by using if but it doesnt quite work.
thank you for the help!
  댓글 수: 2
KALYAN ACHARJYA
KALYAN ACHARJYA 2019년 2월 13일
to draw the dots of numbers 52 till 54, what does it mean?
Jan
Jan 2019년 2월 13일
"solve this by using if but it doesnt quite work" - post the code and the error message. This is much better than letting the readers guiess, what you try and observe.

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채택된 답변

dpb
dpb 2019년 2월 13일
I have a little utility function ("syntax sugar") for such things...
plot(x(iswithin(x,52,54)))
where
>> type iswithin.m
function flg=iswithin(x,lo,hi)
% returns T for values within range of input
% SYNTAX:
% [log] = iswithin(x,lo,hi)
% returns T for x between lo and hi values, inclusive
flg= (x>=lo) & (x<=hi);
>>

추가 답변 (1개)

Jan
Jan 2019년 2월 13일
x=[52.23;52.45;56.32;55.48;56.32;53.39;55.53;53.67;57.89]
subplot(2,2,1)
plot(x)
subplot(2,2,2)
index = find(52 < x && x <= 54);
plot(index, x(index));
subplot(2,2,3)
index = find(54 < x && x <= 56);
plot(index, x(index));
subplot(2,2,4)
index = find(56 < x && x <= 58);
plot(index, x(index));

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