How can i interpolate A and B to get C at a range of instance of A and B?

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Shubham Mohan Tatpalliwar 2018-10-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/422826-how-can-i-interpolate-a-and-b-to-get-c-at-a-range-of-instance-of-a-and-b

编辑： Stephen23 2018-10-9

采纳的回答： KSSV

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A         B        C
19,3  401,7   
30,9  340,1   
74,5  279,2   
84,6  270,7   
91,7  271    
41,5  320,1   
72,4  276,7   
82,2  272,6   
93,8  266,4   
102,9  263,6   
121  263,6   
137  268,8

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Walter Roberson 2018-10-9

scatteredInterpolant()

But first you are going to have challenges reading the data file which appears to be using comma for the decimal place. What is the file format, and can you attach a sample of it so we can program a fix for your file format? Also which release are you using?

Shubham Mohan Tatpalliwar 2018-10-9

编辑：Stephen23 2018-10-9

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function [Kraftstoffverbrauch,Drehzahl,Drehmoment,Geschwindigkeit,DrehmomentAchse]=Kasus2_1(Drehzahl,Drehmoment)
% Modify the dimensions 
nx = length(Drehzahl) ; 
ny = length(Drehmoment) ; 
[num] = xlsread('Mappe2.xlsx') ;
Dz = num(:,1) ; Dz(isnan(Dz))= [ ];
Dm = num(:,2) ;Dm(isnan(Dm))= [ ];
Kv = num(:,3) ;Kv(isnan(Kv))= [ ];
F = scatteredInterpolant([Dz Dm],Kv);
for i= 1:1:nx
for j= 1:1:ny
Kraftstoffverbrauch(i,j) = F(Drehzahl(i),Drehmoment(j));
end
Geschwindigkeit=  (Drehzahl/(1.534*2.64))*2.037*0.06;
DrehmomentAchse= (Drehmoment*1.534*2.64);
end

this the program but the result is not satisfactory.... so i want to go for any other method

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采纳的回答

KSSV 2018-10-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/422826-how-can-i-interpolate-a-and-b-to-get-c-at-a-range-of-instance-of-a-and-b#answer_340463

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[num,txt,raw] = xlsread('Mappe2.xlsx') ;
x  = num(:,1) ; y = num(:,2) ; z = num(:,3) ;
N = 100 ;
[X,Y] = meshgrid(linspace(min(x),max(x),N),linspace(min(y),max(y),N)) ;
Z = griddata(x,y,z,X,Y) ;
surf(X,Y,Z);
shading interp  
hold on 
plot3(x,y,z,'.r')