How to use interp1 with different length?

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john john 2012-1-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/25713-how-to-use-interp1-with-different-length

采纳的回答： Walter Roberson

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Answer 1

Walter Roberson 2012-1-10

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https://ww2.mathworks.cn/matlabcentral/answers/25713-how-to-use-interp1-with-different-length#answer_33680

在 MATLAB Online 中打开

The idea of using interp1 is obviously slowing you down, so use a different method.

MappedX = ((X - OldRangeMin) / (OldRangeMax - OldRangeMin) * (NewRangeMax - NewRangeMin) + NewrangeMin;

But to answer your question: you do not use different X and Y lengths: you use the same lengths, even if they represent different interval widths.

MappedX = interp1([OldRangeMin OldRangeMax], [NewRangeMin NewRangeMax], X);

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john john 2012-1-10

great.. this is my problem now...my problem now....code below is for solving EL, which is he will read excel(contains the table) if the result same on the table he will give equivalent row value, if not he will interpolate the excel...so my problem how do i interpolate the table on excel...

a = get(handles.input1_gamma,'String'); %GAMMA

b = get(handles.input2_h,'String'); %H

c = get(handles.input3_q,'String'); %Q

d = get(handles.input4_power,'String'); %POWER

e = get(handles.input5_eout,'String');

out = str2num(b) + str2num(e);

set(handles.total_answer,'String',out);

data = xlsread('table.xlsx')

[m n] = size(data)

k = get(handles.total_answer,'String')

for i = 1 : m

A = data(i); %check xa 1st row then compare value

A = int2str(A);

if strcmp(A,k)

n = i;

score = data(n,2)%compare sa 2nd value

clc; %clear and cmd

set(handles.equalel,'String',score);

break;

else strcmp(A,k)

n = i;

score = data(n,2)

mHeight = (A)

mEout = (score);

outputArea = interp1(mHeight, mEout);

set(handles.equalel,'String',outputArea);

clc;

end

Walter Roberson 2012-1-17

Do you want the question addressed here or in your newer question http://www.mathworks.com/matlabcentral/answers/26268-can-you-help-me-how-to-interpolate-data-in-the-excel-table

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