hold on producing separate graphs

hold on 
figure 
x = I
y1 = 4*I.^20
hold on
plot(x,y1)

figure 
x = I
y2 = 4*I.^1
hold on
plot(x,y2)
figure 
x = I
y3 = 4*I.^0.3
hold on
plot (x,y3)

Here is my code for the three lines I want to plot on the same graph, however it is producing 3 separate graphs, I wondered how I can edit this to ensure it plots the three lines on one graph?

Thank you

Answer 1

[VBBV]

I = 1:10;
figure 
x = I

x = 1×10

1 2 3 4 5 6 7 8 9 10

y1 = 4*I.^2

y1 = 1×10

4 16 36 64 100 144 196 256 324 400

hold on
plot(x,y1)
% figure 
x = I

x = 1×10

1 2 3 4 5 6 7 8 9 10

y2 = 4*I.^1

y2 = 1×10

4 8 12 16 20 24 28 32 36 40

hold on
plot(x,y2)
% figure 
x = I

x = 1×10

1 2 3 4 5 6 7 8 9 10

y3 = 4*I.^0.3

y3 = 1×10

4.0000 4.9246 5.5616 6.0629 6.4826 6.8471 7.1712 7.4643 7.7327 7.9810

hold on
plot (x,y3)

[Lucy]

Perfect, thank you!

[VBBV]

Its better to use subplot when you have values on lines which differ by significantly high

I = 1:10;
subplot(311)
x = I 

x = 1×10

1 2 3 4 5 6 7 8 9 10

y1 = 4*I.^20  % this ^ 20 is huge number !

y1 = 1×10

1.0e+20 * 0.0000 0.0000 0.0000 0.0000 0.0000 0.0001 0.0032 0.0461 0.4863 4.0000

plot(x,y1) 

y2 = 4*I.^1

y2 = 1×10

4 8 12 16 20 24 28 32 36 40

subplot(312) 
plot(x,y2)

y3 = 4*I.^0.3

y3 = 1×10

4.0000 4.9246 5.5616 6.0629 6.4826 6.8471 7.1712 7.4643 7.7327 7.9810

subplot(313)
plot (x,y3)

Answer 2

[KALYAN ACHARJYA]

Remove all "figure" statements, also one hold on is sufficient.

Same Figures:

x = I
y1 = 4*I.^20
hold on
plot(x,y1)
x = I
y2 = 4*I.^1
plot(x,y2)
x = I
y3 = 4*I.^0.3
plot (x,y3)