How to write code to plot graph of for this function

14 visualizaciones (últimos 30 días)
Rafae Ahmed
Rafae Ahmed el 4 de Feb. de 2020
Respondida: Tomás Cardadeiro el 17 de Nov. de 2021
I wanted to know how to plot my a graph for my function. The x-axis needs to be values of 'v' from from 1-10. The y-axis is the values of the function y(v). I want to label the x-axis: v [mol/m^3] and y-axis y(v). How would I write the code for this? Below is the some of the code I have written.
P=2020000;%P,R,a,b are all constants
R=8.314;
a=0.16330;
b=0.00002401;
v=[0:1:10];%range of v values for the x-axis
y=((R*T)/(v-b))+((a)/((v^2+(2*b*v)-b^2)))+P
plot(v,y)

Respuestas (3)

Sivakumar Selvam
Sivakumar Selvam el 4 de Feb. de 2020
P=2020000;%P,R,a,b are all constants
R=8.314;
a=0.16330;
b=0.00002401;
v=[0:1:10];%range of v values for the x-axis
y=((R*T)/(v-b))+((a)/((v^2+(2*b*v)-b^2)))+P
plot(v,y);
xlabel('v [mol/m^3]')
ylabel('y(v)')
  1 comentario
Rafae Ahmed
Rafae Ahmed el 4 de Feb. de 2020
Hi thanks for answering. But I am getting this error:
Error using /
Matrix dimensions must agree.
Error in assignment2 (line 6)
y=((R*T)/(v-b))+((a)/((v^2+(2*b*v)-b^2)))+P

Iniciar sesión para comentar.


Prashanth Darla
Prashanth Darla el 4 de Feb. de 2020
Editada: Prashanth Darla el 4 de Feb. de 2020
Hey,you're all good if you declare T and elemenmtwise operatorfor division and power (Here I used T as 1)
Here's the code I suggest for you
P=2020000;%P,R,a,b are all constants
R=8.314;
a=0.16330;
b=0.00002401;
T=1;
v=(1:1:10);
disp(v);
for i =v
%range of v values for the x-axis
y=(((R*T)./(i-b))+((a)./((i.^2+(2*b*i)-b.^2)))+P);
disp(y);
end
plot(v,y);
xlabel('v [mol/m^3]')
ylabel('y(v)')
Hope this solves the issue.
  1 comentario
Rafae Ahmed
Rafae Ahmed el 4 de Feb. de 2020
Hi,
I used this code but it is giving me the same value of for y(v) 2.0200e+6. Also the graph is not showing and line or curve when I run the code. Below is the what the formula should be, I wanted to make sure the way I wrote it in Matlab matches what it is normally:
Screen Shot 2020-02-04 at 9.15.32 AM.png
Also, what code do I need to write to show enough 'v' values where it will show where the line or curve on the graph touches the x-axis (the roots).

Iniciar sesión para comentar.


Tomás Cardadeiro
Tomás Cardadeiro el 17 de Nov. de 2021
Hi i know its just a little too late but see if thats not you want
clc
clear all
P=2020000;%P,R,a,b are all constants
R=8.314;
a=0.16330;
b=0.00002401;
T=1;
y1=[];
v1=[];
for v=0:10%range of v values for the x-axis
y=((R*T)/(v-b))+((a)/((v^2+(2*b*v)-b^2)))+P;
y1=[y1 y];
v1=[v1 v]
end
plot(v1,y1)

Categorías

Más información sobre Graph and Network Algorithms en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by