Ask for creating composite curve

how can i construct composite curve for hot stream and cold stream,and than combine both hot stream and cold stream ,the problem is i got 2 value for Y axis it was Ts and Tt and single value for x axis it was enthalpy,when i tried to construct the graph it say "vectors must be the same lenght" .

Thank you

Answer 1

[Geoff Hayes]

David - how are you constructing the graph? What is the line of code that you are using?

If you have two vectors for the y-axis, and one for the x-axis, then why not try the following

 % create some example x and y data
 x  = 1:1:100;
 y1 = x.^2;
 y2 = -x.^2;

 % plot the results: x vs y1, and x vs y2
 plot(x,y1,x,y2);

Your error message seems to indicate that you were trying to plot a combination of the two y vectors versus the single x vector (and so they would be of different lengths). Was this the case?

[David Napitupulu]

here is the sample of my data

*HE1 HOT Temp in: 169 Temp out 32,00 Enthalpy =76833896,87

*HE1 COLD Temp in 32 Temp out 66 Enthalpy =36396269,14

*HE2 HOT Temp in 121 Temp out 91 Enthalpy =25240831,2

*HE2 COLD Temp in 66 Temp Out 88 Enthalpy =26106113,88

yes,i try to combine two y vectors to single x vector,because in data y i got Temp in Temp out and enthalpy in x axes.

[Geoff Hayes]

What is the code that you are using to plot the data?