2-D line plot - MATLAB plot (2024)

Create x as a vector of linearly spaced values between 0 and $$2\pi$$. Use an increment of $$\pi /100$$ between the values. Create y as sine values of x. Create a line plot of the data.

x = 0:pi/100:2*pi;y = sin(x);plot(x,y)

Define x as 100 linearly spaced values between $$-2\pi$$ and $$2\pi$$. Define y1 and y2 as sine and cosine values of x. Create a line plot of both sets of data.

x = linspace(-2*pi,2*pi);y1 = sin(x);y2 = cos(x);figureplot(x,y1,x,y2)

Define Y as the 4-by-4 matrix returned by the magic function.

Y = magic(4)

Y = 4×4 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1

Create a 2-D line plot of Y. MATLAB® plots each matrix column as a separate line.

figureplot(Y)

Plot three sine curves with a small phase shift between each line. Use the default line style for the first line. Specify a dashed line style for the second line and a dotted line style for the third line.

x = 0:pi/100:2*pi;y1 = sin(x);y2 = sin(x-0.25);y3 = sin(x-0.5);figureplot(x,y1,x,y2,'--',x,y3,':')

MATLAB® cycles the line color through the default color order.

Plot three sine curves with a small phase shift between each line. Use a green line with no markers for the first sine curve. Use a blue dashed line with circle markers for the second sine curve. Use only cyan star markers for the third sine curve.

x = 0:pi/10:2*pi;y1 = sin(x);y2 = sin(x-0.25);y3 = sin(x-0.5);figureplot(x,y1,'g',x,y2,'b--o',x,y3,'c*')

Create a line plot and display markers at every fifth data point by specifying a marker symbol and setting the MarkerIndices property as a name-value pair.

x = linspace(0,10);y = sin(x);plot(x,y,'-o','MarkerIndices',1:5:length(y))

Create a line plot and use the LineSpec option to specify a dashed green line with square markers. Use Name,Value pairs to specify the line width, marker size, and marker colors. Set the marker edge color to blue and set the marker face color using an RGB color value.

x = -pi:pi/10:pi;y = tan(sin(x)) - sin(tan(x));figureplot(x,y,'--gs',... 'LineWidth',2,... 'MarkerSize',10,... 'MarkerEdgeColor','b',... 'MarkerFaceColor',[0.5,0.5,0.5])

Use the linspace function to define x as a vector of 150 values between 0 and 10. Define y as cosine values of x.

x = linspace(0,10,150);y = cos(5*x);

Create a 2-D line plot of the cosine curve. Change the line color to a shade of blue-green using an RGB color value. Add a title and axis labels to the graph using the title, xlabel, and ylabel functions.

figureplot(x,y,'Color',[0,0.7,0.9])title('2-D Line Plot')xlabel('x')ylabel('cos(5x)')

Define t as seven linearly spaced duration values between 0 and 3 minutes. Plot random data and specify the format of the duration tick marks using the 'DurationTickFormat' name-value pair argument.

t = 0:seconds(30):minutes(3);y = rand(1,7);plot(t,y,'DurationTickFormat','mm:ss')

Since R2022a

A convenient way to plot data from a table is to pass the table to the plot function and specify the variables to plot.

Read weather.csv as a timetable tbl. Then display the first three rows of the table.

tbl = readtimetable("weather.csv");tbl = sortrows(tbl);head(tbl,3)

 Time WindDirection WindSpeed Humidity Temperature RainInchesPerMinute CumulativeRainfall PressureHg PowerLevel LightIntensity ____________________ _____________ _________ ________ ___________ ___________________ __________________ __________ __________ ______________ 25-Oct-2021 00:00:09 46 1 84 49.2 0 0 29.96 4.14 0 25-Oct-2021 00:01:09 45 1.6 84 49.2 0 0 29.96 4.139 0 25-Oct-2021 00:02:09 36 2.2 84 49.2 0 0 29.96 4.138 0 

Plot the row times on the x-axis and the RainInchesPerMinute variable on the y-axis. When you plot data from a timetable, the row times are plotted on the x-axis by default. Thus, you do not need to specify the Time variable. Return the Line object as p. Notice that the axis labels match the variable names.

p = plot(tbl,"RainInchesPerMinute");

To modify aspects of the line, set the LineStyle, Color, and Marker properties on the Line object. For example, change the line to a red dotted line with point markers.

p.LineStyle = ":";p.Color = "red";p.Marker = ".";

Since R2022a

Read weather.csv as a timetable tbl, and display the first few rows of the table.

tbl = readtimetable("weather.csv");head(tbl,3)

 Time WindDirection WindSpeed Humidity Temperature RainInchesPerMinute CumulativeRainfall PressureHg PowerLevel LightIntensity ____________________ _____________ _________ ________ ___________ ___________________ __________________ __________ __________ ______________ 25-Oct-2021 00:00:09 46 1 84 49.2 0 0 29.96 4.14 0 25-Oct-2021 00:01:09 45 1.6 84 49.2 0 0 29.96 4.139 0 25-Oct-2021 00:02:09 36 2.2 84 49.2 0 0 29.96 4.138 0 

Plot the row times on the x-axis and the Temperature and PressureHg variables on the y-axis. When you plot data from a timetable, the row times are plotted on the x-axis by default. Thus, you do not need to specify the Time variable.

Add a legend. Notice that the legend labels match the variable names.

plot(tbl,["Temperature" "PressureHg"])legend

Starting in R2019b, you can display a tiling of plots using the tiledlayout and nexttile functions. Call the tiledlayout function to create a 2-by-1 tiled chart layout. Call the nexttile function to create an axes object and return the object as ax1. Create the top plot by passing ax1 to the plot function. Add a title and y-axis label to the plot by passing the axes to the title and ylabel functions. Repeat the process to create the bottom plot.

% Create data and 2-by-1 tiled chart layoutx = linspace(0,3);y1 = sin(5*x);y2 = sin(15*x);tiledlayout(2,1)% Top plotax1 = nexttile;plot(ax1,x,y1)title(ax1,'Top Plot')ylabel(ax1,'sin(5x)')% Bottom plotax2 = nexttile;plot(ax2,x,y2)title(ax2,'Bottom Plot')ylabel(ax2,'sin(15x)')

Define x as 100 linearly spaced values between $$-2\pi$$ and $$2\pi$$. Define y1 and y2 as sine and cosine values of x. Create a line plot of both sets of data and return the two chart lines in p.

x = linspace(-2*pi,2*pi);y1 = sin(x);y2 = cos(x);p = plot(x,y1,x,y2);

Change the line width of the first line to 2. Add star markers to the second line. Use dot notation to set properties.

p(1).LineWidth = 2;p(2).Marker = '*';

Plot a circle centered at the point (4,3) with a radius equal to 2. Use axis equal to use equal data units along each coordinate direction.

r = 2;xc = 4;yc = 3;theta = linspace(0,2*pi);x = r*cos(theta) + xc;y = r*sin(theta) + yc;plot(x,y)axis equal