How i can multiple plots do that are curves with basic fitting?

Hello,

I have tried to multiple plots to do them curves but if i do one and want another then first one disappears. Is there some solution in matlab function to do that are multiple or isn't at all possible? This is what i want to do:

I would like that i have for the green plot curve like for the blue (i would like to have one more quadratic for green). Thank you in advance for answers.

Answer 1

[Walter Roberson]

After plotting the first one, give the command

hold on

and then plot more. When it is time to allow a new plot to overwrite what has gone before

hold off

[androSLO]

Thank you for that but how can i give between two plots if i have this code:

clc clear all y1=[52.50 48.75 30 20 13.75 10 7.50 5 3]; x=[253 241 207 184 161.1 137.8 114.6 92.3 68.8]; y2=[0.683 0.586 0.347 0.237 0.157 0.117 0.092 0.075 0.060]; %figure 1 [AX,H1,H2] = plotyy(x,y1,x,y2,'plot'); set(get(AX(1),'Ylabel'),'String','P_1_0 [W]') set(get(AX(2),'Ylabel'),'String','I_1_0 [A]') ylim([0 60]) xlabel('U_1_0 [V]') title('Diagram odvisnosti P_1_0 in I_1_0 od napetosti U_1_0') grid on % %figure 2

x1 = 230; y11=interp1(x,y1,x1) Y21=interp1(x,y2,x1)

[androSLO]

I have tried but nothing goes. Always when i go on figure and basic fitting when i choose data 1 in makes curve and when i choose data 2 delete first curve and makes for data 2.