How can I plot multiple results from a function on the same graph?

Hello everyone,

I'm working on a Windchill conversion assignment, any guidance would be highly appreciated.

I want to display each result from the function (windchill_calc) - which takes a pre-defined temperature vector and a user inputted vector (of 5) and works out windchill (W_2)

Except the plot is only showing the result from the 5th value of the vector, I understand why this is happening and that this is quite a simple error but I can't work out a solution - any ideas?

(temp_vector is previously defined)

_______________________

 windspeed_user = input('please enter a 5 windspeed vector'); %requesting input from user.

 i = 1; 

 for i = 1:1:5;

    W_2 = Windchill_calc(temp_vector, windspeed_user(i)) %calls function 

 end

 plot (W_2, temp_vector)
 xlabel ('Temperature (Fahrenheit)')
 ylabel ('Windchill results')
 grid on

Answer 1

[David Sanchez]

I guess you have to work a bit with your data, but the hold on, hold off is what you need:

   windspeed_user = input('please enter a 5 windspeed vector'); %requesting input from user.

   i = 1; 

   for i = 1:5;

      W_2 = Windchill_calc(temp_vector, windspeed_user(i)) %calls function
      hold on
      plot (W_2, temp_vector)

   end

   hold off
   xlabel ('Temperature (Fahrenheit)')
   ylabel ('Windchill results')
   grid on

[Aaron]

Yeah your right I do - I'm now trying to embellish a little, do you know why this if statement isn't working? (I want to limit the amount of values user inputs)

This is the result after adding the 'hold' feature, thank you for your fast reply.

Answer 2

[Walter Roberson]

Each iteration of the loop, you are over-writing all of W_2, so at the end of the loop only the final assignment has had any effect.

It appears to me that your W_2 would be a vector. If so, then

for i = 1 : 5
  W_2 = Windchill_calc(temp_vector, windspeed_user(i)) %calls function 
  plot(temp_vector, W_2);
  hold on
end

[Aaron]

Mm, that exactly what was happening - because as you said its the last result stored.

The hold function solved it instantly, :). Thankyou for your help and quick reply.

[Walter Roberson]

Notice I also switched W_2 and temp_vector, as the independent variable should go first in the plot()