Multiple values of x what will be code
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    rajdeep singh
 le 11 Fév 2020
  
    
    
    
    
    Commenté : Star Strider
      
      
 le 11 Fév 2020
            %it is just a example i want to know if there are multiple number of say x with other constant say a and b. Is it possible to plot graph between x and y. I am working with similar code that i wrote below but graph is not showing. Clc; Close all; Clear all; A=5; B=6; X=4,9,56,33 Y=(a+b)/x Plot (X,Y)
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  Star Strider
      
      
 le 11 Fév 2020
        Try this: 
A=5; 
B=6; 
X = [4,9,56,33]; 
Y=(A+B)./X; 
figure
plot (X,Y)
Use element-wise operations (the (.) operator) in the division.  See Array vs. Matrix Operations for an extended discussion.  
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  Star Strider
      
      
 le 11 Fév 2020
				The arrayfun call (essentially a slow for loop) is not necessary here.  Vectorised MATLAB commands make explicit loops and other such operations unnecessary.  
If I understand correctly what you want to do, this should work: 
A=31E6; 
B=7.625E-43; 
C=8.38E-34; 
D=700; 
f=[23.27,24.72,33.18,34.63,44.08,44.54,44.99]; 
zfcn = @(z) (2*B*z.^3)./(A*exp(B*z)-1);
figure
plot(f, zfcn(f))
grid
This works for vector ‘f’.  Again, note the use of element-wise operations in the exponentiation and division.  You can assign the output of ‘zfcn(f)’ to an intermediate variable if you wish.  I do not here, and simply use it as an argument to the plot function.  
Plus de réponses (1)
  fred  ssemwogerere
      
 le 11 Fév 2020
        While your question may not be so clear, from my understanding, you are trying to find a vector,"Y" from a vector of "X" values. Try this:
A=5; B=6; X=[4,9,56,33]; 
% your vector "Y". From this you can proceed with your plot
Y=arrayfun(@(z) (A+B)/z, X);
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