how to get a expected plot for these values?

2018 10 1
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更新时间：2018 10 1
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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

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JohnGalt
JohnGalt 2018-10-1
use the '{}code' button to make your code more readable please...
JohnGalt
JohnGalt 2018-10-1
also what are the inputs 'Drehzahl, Drehmoment'
JohnGalt
JohnGalt 2018-10-1
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...
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
i have nullified minuteerrors but still the main problem is not solved which is expected from my question
Walter Roberson
Walter Roberson 2018-10-1
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
JohnGalt 2018-10-1
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...
what changes should i make to get the expected one

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 采纳的回答

KSSV
KSSV 2018-10-1

0 个投票

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')

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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
KSSV 2018-10-1
You frame your vectors and arrange them into a matrix.
Actually i am trying to get Z in matrix form form but failed

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