ENES101 zyBooks Chapter 7.1 - 7.2

line plot

A _____________ connects data points by line segments.

*

Asterisk

blue

Color plot specifiers. b

cyan

Color plot specifiers. c

green

Color plot specifiers. g

black

Color plot specifiers. k

magenta

Color plot specifiers. m

red

Color plot specifiers. r

white

Color plot specifiers. w

yellow

Color plot specifiers. y

cos(2 * xVals)

Complete the statement to calculate> the yVals1-values for the top plot. xVals = linspace(-0.01, 3*pi, 100); subplot(2, 1, 1); yVals1 =__________________; plot(xVals/pi, yVals1)

[-.01, 3.01, -1.1, 1.1]

Complete the statement to set the plot x-axis from -.01 to 3.01 and the y-axis from -1.1 to 1.1. axis(_______________________);

x

Cross

d

Diamond

v

Downward-pointing triangle

p

Five-pointed star (pentagram)

<

Left-pointing triangle

plot

Line plot

semilogy

Line plot with linear x and logarithmic y axes

semilogx

Line plot with logarithmic x and linear y axes

loglog

Line plot with logarithmic x and y axes.

plotyy

Line plots with y-axes on both left and right side

.

Point

>

Right-pointing triangle

h

Six-pointed star (hexagram)

s

Square

stairs

Stairstep graph

plot(x, m*x + b)

Suppose x is a row array, m is a scalar variable equal to the slope of a line, and b is a scalar variable equal to the y-intercept. Write a statement that plots the line determined by the given x, m, and b:

xlabel, ylabel, title function

The _________, ___________, and __________________s allow a programmer to set the name of the x-axis, y-axis, and plot title, respectively.

subplot(2, 1, 1)

The first command is to declare that a combined figure will be made consisting of two plots stacked vertically on top of each other and plot will be drawn at position 1. Give this command. xVals = linspace(-0.01, 3*pi, 100); ____________________________;

True The array lengths must be equal; together the arrays represent the x/y values of a sequence of points.

The following command generates an error because the array lengths differ: plot( [2, 4, 6], [99, 88] )

False The plotted points are (2,4), (5,6), and (3,7). No error is generated, but the plot's lines will connect (2,4) with (5,6), and (5,6) with (3,7), causing a zigzag appearance (like the shape >).

The following command generates an error because the x points are not in ascending order:

False All x values must be in first array, y values in second: plot( [10, 20], [99, 88] ).

The following command plots the points (10, 99) and (20, 88): plot([10, 99], [20, 88])

False The array with x values must appear first: plot( [100, 200], [55, 45]).

The following command plots the points(100, 55) and (200, 45): plot([55, 45], [100, 200])

axis

The programmer can set the x and y-axis limits using the_____ command.

graph

The resulting graphical representation is commonly called a plot or ___________.

plot(xvals, yvals, 'o')

Type arrays as [1, 2, 3]. Type text as 's'. Type the command to plot the points stored in arrays xvals and yvals, drawing points as circles and with no line segments.

xlabel('Speed')

Type arrays as [1, 2, 3]. Type text as 's'. Type the command to set the x-axis label to: Speed.

axis([5, 10, 0, 100])

Type arrays as [1, 2, 3]. Type text as 's'. Type the command to set the x-axis limits from 5 to 10 and y-axis limits from 0 to 100.

plot( [10, 2, 5] )

Type plot commands in the form: plot([5, 9, 2]...). Type the plot command to plot data values (1, 10), (2, 2), and (3, 5) by using only one row array.

plot([2, 4, 6], [5, 8, 7])

Type plot commands in the form: plot([5, 9, 2]...). Type the plot command to plot points (2, 5), (4, 8), and (6, 7). Use two arrays.

^

Upward-pointing triangle

plot(x, m*x + b, 'c')

Write a statement that plots a cyan line for a row array x, slope m, and intercept b.

plot(x, m*x + b, 'c--', 'LineWidth', 3)

Write a statement that plots a row array x, slope m, and intercept b as a cyan dashed line with line width 3.

plot(xVals/pi, yVals2)

Write a statement to output the bottom plot. yVals2 = 0.5 * (abs(cos(2 * xVals)) - cos(2 * xVals));

subplot(2, 1, 2)

Write a statement to select the plot for the bottom figure of the 2 vertically stacked plots

plot

______________ means to represent data graphically.

grid

adds a grid to the plot

hold on

allows multiple plots to be superimposed on the same axes

text

allows placing text at specified coordinates of the plot

gtext

allows positioning of text with the mouse

0 to 10; 5 to 50

axis([0, 10, 5, 50]) sets the x-axis to range from __________, and the y-axis from _________. The axis command should be applied after the plot command.

close(n)

closes figure number n

subplot(a, b, c)

creates an a x b matrix of plots with c the current figure

-.

dashdot

--

dashed

:

dotted

xlabel

labels the x-axis

ylabel

labels the y-axis

figure(n)

makes figure number n the current figure

(none)

no line

Circle

o

hold off

releases hold on current plot and allows a new graph to be drawn

axis

sets the aspect ratio of x and y axes, ticks etc.

title

sets the graph title

-

solid

orient

specifies the orientation of a figure