Can any one help me on this

s = load('pvev.mat');
pvev = s.pvev;
T = pvev{:,1};
PV = pvev{:,2};
ST = pvev{:,3};
EV = pvev{:,4};
 for T = pvev{:,1}
     if((PV > ST) & (PV > EV))
         m = PV;
         plot(T,m,'r','linewidth',2);
         hold on
     elseif((ST > PV) & (ST > EV))
         m = ST;
         plot(T,m,'g','linewidth',2);
     elseif((EV > ST) & (EV > PV))
         m = EV;
         plot(T,m,'b','linewidth',2);
         hold off;
         grid on;
     end
     
 end

it says 'Operands to the || and && operators must be convertible to logical scalar values.

[Walter Roberson]

Please show the complete error message.

Also, you appear to be plotting at a number of individual time points. When you use plot() then it only creates lines when you ask it to plot() two or more adjacent finite points in a single call to plot(). You should specify a marker in your plot() calls to be sure of seeing output for individual points.

Answer 1

[Walter Roberson]

Code is attached. I had to guess about what you were trying to do.

One of your cases leaves m undefined. That case occurs for your first point, time 0.

Your existing code implied that you would prefer to use different colors of line for the different segments. I choose to use different colors of markers instead. Using different colors of line is more work, and you need to define how to handle the transition between two points each of which have a clearly defined color but the two are different colors.

[Walter Roberson]

Revised version to draw the colored lines is attached.

[behailu woldesemayet]

It works well

thanks

Answer 2

[behailu woldesemayet]

Operands to the || and && operators must be convertible to logical scalar values.

Error in solarpv (line 8)

if((PV > ST) && (PV > EV))

here is the full error message

Answer 3

[behailu woldesemayet]

Its Right but I want to change the color of the line to be visible.

thanks

[Walter Roberson]

What line color do you want to show up when one point is one of the cases, but the next point is a different one of the cases?

[behailu woldesemayet]

for the first case, red the second blue and the third green.

Answer 4

[behailu woldesemayet]

for the first case, red the second blue and the third green.