MATLAB plot3 in MATLAB^®

Plot 3-D Helix

Define t as a vector of values between 0 and 10π. Define st and ct as vectors of sine and cosine values. Then plot st, ct, and t.

t = 0:pi/50:10*pi;
st = sin(t);
ct = cos(t);
plot3(st,ct,t)

fig2plotly()

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• SSIM

Plot Multiple Lines

Create two sets of x-, y-, and z-coordinates.

t = 0:pi/500:pi; xt1 = sin(t).cos(10t); yt1 = sin(t).sin(10t); zt1 = cos(t);

xt2 = sin(t).cos(12t); yt2 = sin(t).sin(12t); zt2 = cos(t);

Call the plot3 function, and specify consecutive XYZ triplets.

plot3(xt1,yt1,zt1,xt2,yt2,zt2)

fig2plotly()

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• SSIM

Plot Multiple Lines Using Matrices

Create matrix X containing three rows of x-coordinates. Create matrix Y containing three rows of y-coordinates.

t = 0:pi/500:pi; X(1,:) = sin(t).cos(10t); X(2,:) = sin(t).cos(12t); X(3,:) = sin(t).cos(20t);

Y(1,:) = sin(t).sin(10t); Y(2,:) = sin(t).sin(12t); Y(3,:) = sin(t).sin(20t);

Create matrix Z containing the z-coordinates for all three sets.

Z = cos(t);

Plot all three sets of coordinates on the same set of axes.

plot3(X,Y,Z)

fig2plotly()

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• SSIM

Specify Equally-Spaced Tick Units and Axis Labels

Create vectors xt, yt, and zt.

t = 0:pi/500:40pi; xt = (3 + cos(sqrt(32)t)).cos(t); yt = sin(sqrt(32) * t); zt = (3 + cos(sqrt(32)t)).*sin(t);

Plot the data, and use the axis equal command to space the tick units equally along each axis. Then specify the labels for each axis.

plot3(xt,yt,zt)
axis equal
xlabel('x(t)')
ylabel('y(t)')
zlabel('z(t)')

fig2plotly()

• Plot
• SSIM

Plot Points as Markers Without Lines

Create vectors t, xt, and yt, and plot the points in those vectors using circular markers.

t = 0:pi/20:10*pi;
xt = sin(t);
yt = cos(t);
plot3(xt,yt,t,'o')

fig2plotly()

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• SSIM

Customize Color and Marker

Create vectors t, xt, and yt, and plot the points in those vectors as a blue line with 10-point circular markers. Use a hexadecimal color code to specify a light blue fill color for the markers.

t = 0:pi/20:10*pi;
xt = sin(t);
yt = cos(t);
plot3(xt,yt,t,'-o','Color','b','MarkerSize',10,'MarkerFaceColor','#D9FFFF')

fig2plotly()

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Specify Line Style

Create vector t. Then use t to calculate two sets of x and y values.

t = 0:pi/20:10*pi; xt1 = sin(t); yt1 = cos(t);

xt2 = sin(2t); yt2 = cos(2t);

Plot the two sets of values. Use the default line for the first set, and specify a dashed line for the second set.

plot3(xt1,yt1,t,xt2,yt2,t,'--')

fig2plotly()

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• SSIM

Modify Line After Plotting

Create vectors t, xt, and yt, and plot the data in those vectors. Return the chart line in the output variable p.

t = linspace(-10,10,1000); xt = exp(-t./10).sin(5t); yt = exp(-t./10).cos(5t); p = plot3(xt,yt,t);

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Change the line width to 3.

p.LineWidth = 3;

fig2plotly()

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Specify Target Axes

Starting in R2019b, you can display a tiling of plots using the tiledlayout and nexttile functions. Call the tiledlayout function to create a 1-by-2 tiled chart layout. Call the nexttile function to create the axes objects ax1 and ax2. Create separate line plots in the axes by specifying the axes object as the first argument to plot3.

tiledlayout(1,2)

% Left plot
ax1 = nexttile;
t = 0:pi/20:10*pi;
xt1 = sin(t);
yt1 = cos(t);
plot3(ax1,xt1,yt1,t)
title(ax1,'Helix With 5 Turns')

% Right plot
ax2 = nexttile;
t = 0:pi/20:10*pi;
xt2 = sin(2*t);
yt2 = cos(2*t);
plot3(ax2,xt2,yt2,t)
title(ax2,'Helix With 10 Turns')

fig2plotly()

• Plot
• SSIM

Plot Duration Data with Custom Tick Format

Create x and y as vectors of random values between 0 and 1. Create z as a vector of random duration values.

x = rand(1,10); y = rand(1,10); z = duration(rand(10,1),randi(60,10,1),randi(60,10,1));

Plot x, y, and z, and specify the format for the z-axis as minutes and seconds. Then add axis labels, and turn on the grid to make it easier to visualize the points within the plot box.

plot3(x,y,z,'o','DurationTickFormat','mm:ss')
xlabel('X')
ylabel('Y')
zlabel('Duration')
grid on

fig2plotly()

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• SSIM

Plot Line With Marker at One Data Point

Create vectors xt, yt, and zt. Plot the values, specifying a solid line with circular markers using the LineSpec argument. Specify the MarkerIndices property to place one marker at the 200th data point.

t = 0:pi/500:pi;
xt(1,:) = sin(t).*cos(10*t);
yt(1,:) = sin(t).*sin(10*t);
zt = cos(t);
plot3(xt,yt,zt,'-o','MarkerIndices',200)

fig2plotly()

• Plot
• SSIM