how to get a expected plot for these values?

function [Kraftstoffverbrauch,Wi, Drehzahl, Drehmoment]=Kasus_1_4(Drehzahl, Drehmoment)
% Modify the dimensions 
nx = length(Drehzahl) ; 
ny = length(Drehmoment) ; 

if nx > ny 
Drehmoment = linspace(min(Drehmoment),max(Drehmoment),nx ) ; 
elseif nx<ny
    Drehzahl = linspace(min(Drehzahl),max(Drehzahl),ny) ;
end
[num,txt,raw] = xlsread('Mappe1.xlsx') ;
Dz = num(:,1) ; Dz(isnan(Dz))= [ ];
A = num(:,2:end) ;
A(isnan(A(:,1)),:)=  [] ;
W = A(1:2:end,:) ;
Dm = A(2:2:end,:) ;
Dz1 = repmat(Dz,1,size(Dm,1)) ;
idx = ~isnan(Dm) ;
F = scatteredInterpolant([Dz1(idx) Dm(idx)],W(idx));

Wi = F(Drehzahl,Drehmoment);

Drehmoment2 = Drehmoment*3.0769*2.64;
Geschwindigkeit=  (Drehzahl/(3.07*2.64))*2.037*0.06;
Kraftstoffverbrauch= (2*3.14*(Drehmoment).*(Drehzahl))./(Wi*0.98*0.8.*(Geschwindigkeit)*600);
plot3(Drehzahl,Drehmoment,Kraftstoffverbrauch)
xlabel ('Drehzahl(1/min)');ylabel ('Drehmoment(N.m)'); zlabel ('Kraftstoffverbrauch(kWh/100km)');
title ('Drehmoment vs Drehzahl Diagram');
end

[JohnGalt]

use the '{}code' button to make your code more readable please...

[JohnGalt]

also what are the inputs 'Drehzahl, Drehmoment'

[JohnGalt]

t = linspace(3/4*pi,2*pi,50)';
Drehzahl = [3*cos(t); 2*cos(t); 0.7*cos(t)];
Drehmoment = [3*sin(t); 2*sin(t); 0.7*sin(t)];
[Kraftstoffverbrauch,Wi]=Kasus_1_4(Drehzahl, Drehmoment)

on another note, it's better practice to add the filename as input to the function e.g.

   function [Kraftstoffverbrauch,Wi, Drehzahl, Drehmoment]=Kasus_1_4(mappeXLSXname,Drehzahl, Drehmoment)
  ...
  [num,txt,raw] = xlsread(mappeXLSXname) ;
 ...

Also, it's unusual to have the same arguments in the input and the output... as whatever's calling the function already knows the input... and if the input is changing then the output name should be different.

and finally, 'Drehmoment2' is created but not used...

[Shubham Mohan Tatpalliwar]

if true
  % code
function [Kraftstoffverbrauch,Wi, Drehzahl, Drehmoment]=Kasus_1_4(Drehzahl, Drehmoment) 
nx = length(Drehzahl) ; ny = length(Drehmoment) ;
if nx > ny Drehmoment = linspace(min(Drehmoment),max(Drehmoment),nx ) ; elseif nx<ny Drehzahl = linspace(min(Drehzahl),max(Drehzahl),ny) ; 
end
[num,txt,raw] = xlsread('Mappe1.xlsx') ; Dz = num(:,1) ; 
Dz(isnan(Dz))= [ ]; A = num(:,2:end) ; A(isnan(A(:,1)),:)= [] ; 
W = A(1:2:end,:) ; 
Dm = A(2:2:end,:) ;
Dz1 = repmat(Dz,1,size(Dm,1)) ;
idx = ~isnan(Dm) ; 
F = scatteredInterpolant([Dz1(idx) Dm(idx)],W(idx));
Wi = F(Drehzahl,Drehmoment);
Drehmoment2 = Drehmoment*3.0769*2.64; 
Geschwindigkeit= (Drehzahl/(3.07*2.64))*2.037*0.06; 
Kraftstoffverbrauch= (2*3.14*(Drehmoment).*(Drehzahl))./(Wi*0.98*0.8.*(Geschwindigkeit)*600); 
plot3(Drehzahl,Drehmoment,Kraftstoffverbrauch) xlabel ('Drehzahl(1/min)');ylabel ('Drehmoment(N.m)'); zlabel ('Kraftstoffverbrauch(kWh/100km)'); 
title ('Drehmoment vs Drehzahl Diagram'); 
end
end

Drehzahl =500:6000 Drehmoment=5:250

[Shubham Mohan Tatpalliwar]

i have nullified minuteerrors but still the main problem is not solved which is expected from my question

[Walter Roberson]

Your expected is pretty much a contour() plot except with the value at each point text() into place. Your code makes no attempt to contour or text labels into place.

[JohnGalt]

aside from the labelling... the issue is that your inputs scale linearly with each other ... so of course you're going to get a straight line...

[Shubham Mohan Tatpalliwar]

what changes should i make to get the expected one

Answer 1

[KSSV]

Should try something like this:

[num,txt,raw] = xlsread('Mappe1.xlsx') ;

% [num,txt,raw] = xlsread('Mappe1.xlsx') ;
x = num(:,1) ; x(isnan(x))= [ ];
A = num(:,2:end) ;
A(isnan(A(:,1)),:)=  [] ;
Y = A(1:2:end,:) ;
Z = A(2:2:end,:) ;
X = repmat(x,1,size(Y,1)) ;
contour(X,Y,Z','ShowText','on')

[Shubham Mohan Tatpalliwar]

Hey thanx... i got the concept but the problrm is that i want the graph for kraftstoffverbrauch. which is a matrix

and for that the Wi(Z) values are in vector. which not expected as a result

[KSSV]

You frame your vectors and arrange them into a matrix.

[Shubham Mohan Tatpalliwar]

Actually i am trying to get Z in matrix form form but failed