How to combine a while loop and a for loop on one graph

the while loop is set up as such

fig=figure(1);
x(1)=0;
fx(1) = 0;
index = 2;
while (x<20) & index < 1000
  x(index)=x(index-1)+1
  fx(index)= x(index)^3 - (5*x(index))^2 + 2^(x(index)) - 10000.*x(index);
    clf;
  grid on;
  hold on;
  xlabel('x', 'FontSize', 10); 
  ylabel('fx', 'FontSize', 10); 
  title('While Loop', 'FontSize',10);
  p = plot(x, fx, 'ro-', 'LineWidth',2, 'MarkerSize', 10);
  index = index + 1;
end

set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1])

and the for loop set up as such

fig=figure(1);
x(1)=0;
fx(1) = -3;
index = 2;
for index = 2 : 100000
  x(index)=x(index-1)+0.5
  fx(index)= 20000*log(x(index))-3*x(index);
  clf;
  grid on;
  hold on;
  xlabel('x', 'FontSize', 10); 
  ylabel('fx', 'FontSize', 10); 
  title('For Loop', 'FontSize', 10);
  p = plot(x, fx, 'bo-', 'LineWidth',4, 'MarkerSize', 10);
  % Exit loop if x >= 20
  if x(index) >= 20
    break;
  end
end
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);

If anyone would be willing to help me find how to place both on one graph I would greatly appreciate it!

The while loop function is f(x) = x^3 - (5*x)^2 + 2^(x) - 10000.*x 0<x<20

The for loop function is f(x) = 20000*log(x) - 3*x 1<x<20

Answer 1

[Image Analyst]

Try 3*x(index) instead of 3*x.

[Nicholas]

Thank you! Do you know how I can get the two onto one graph?

[Image Analyst]

Like I said in your duplicate question:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 25;
x(1)=0;
fx(1) = 0;
index = 2;
while (x<20) & index < 1000 % Add index check as a failsafe.
  x(index)=x(index-1)+0.5;
  fx(index)= x(index)^3 - (5*x(index))^2 + 2^(x(index)) - 10000.*x(index);
  p = plot(x, fx, 'ro-', 'LineWidth',2, 'MarkerSize', 10);
  index = index + 1;
end
grid on;
hold on;
xlabel('x', 'FontSize', fontSize);
ylabel('fx', 'FontSize', fontSize);
title('While Loop', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);

x2(1)=0;
fx2(1) = 0;
index = 2;
for index = 2 : 100000
  x2(index)=x2(index-1)+0.5;
  fx2(index) = 20000*log(x2(index)) - 3*x2(index);
  p = plot(x2, fx2, 'bo-', 'LineWidth',2, 'MarkerSize', 5);
  % Exit loop if x >= 20
  if x(index) >= 20
    break;
  end
end
grid on;
xlabel('x', 'FontSize', fontSize);
ylabel('fx', 'FontSize', fontSize);
title('Both Loop', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);