MATLAB: Plotting polynomials side by side.

plot

Hello,

Is it possible to plot two polynomials next to each other as opposed to on top of each other? The problem being they would both need to originally extend from x values from -1 to 1, but then those x values wouldn't be the same when plotted side by side and the graph would change. This is my approach so far:

 x = -1:0.1:1;
 c = [-5 4 1 7];
 y = polyval(c,x);
 plot(x,y)
 hold on
 c2 = [4 -2 1 9 2];
 y2 = polyval(c2,x);
 plot(x,y2)

Best Answer

 plot(x+someshift,y2)

Related Solutions

MATLAB: Plotting two vectors side by side.

Use the linspace function:

A = rand(1,  601);                      % Create Data

B = rand(1, 1200);                      % Create Data
Ax = linspace(0, 601,  601);            % X-Coordinate Vector For ‘A’
Bx = linspace(0, 601, 1200);            % X-Coordinate Vector For ‘B’
figure(1)
subplot(2,1,1)
plot(Ax, A)
grid
subplot(2,1,2)
plot(Bx, B)
grid

Experiment to get the result you want.

MATLAB: Polyfit, polyval and plot

Because the syntax should be

polyfit(x,y,N)

and not

polyfit(y,x,N)

Here is some code that illustrates the fix:

x = 1:503;

y = 250 + 0.02*x + 0.005*x.^2 + 0.2*rand(1,503).*x;

figure
polyfit(y,x,0);
coef1 = polyfit(x,y,0);
y1 = polyval(coef1,x);
hold on
plot(x,y,'.');
plot(x,y1);  
polyfit(x,y,1);
coef2 = polyfit(x,y,1);
y2 = polyval(coef2,x);
plot(x,y2);
polyfit(y,x,2);
coef3 = polyfit(x,y,2);
y3 = polyval(coef3,x);
plot(x,y3);

Best Answer

Related Solutions

MATLAB: Plotting two vectors side by side.

MATLAB: Polyfit, polyval and plot

Related Question