Data Science

Graphics Devices

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Point out the wrong statement.
For quick visualizations and exploratory analysis, usually you want to use the screen device
Functions like xyplot in lattice will not default to sending a plot to the screen device
Not all graphics devices are available on all platforms
None of the mentioned
Explanation:
window function cannot be used on Mac.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
dev.copy2pdf specifically copy a plot to a PDF file.
True
False
Explanation:
Copying a plot is not an exact operation, so the result may not be identical to the original.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Point out the correct statement.
On Mac, the screen device is launched with quartz
On Windows, the screen device is launched with wind
On Unix, the screen device is launched with x12
All of the mentioned
Explanation:
On Windows, the screen device is launched with window function.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Every open graphics device is assigned an integer greater than 2.
True
False
Explanation:
Every open graphics device is assigned an integer greater than equal to 2.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is alternative technique toprincipal component analysis?
Factor analysis
Independent components analysis
Latent semantic analysis
All of the mentioned
Explanation:
PC’s may mix real patterns.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Point out the correct statement.
Vector formats are good for line drawings and plots with solid colors using a modest number of points
Vector formats are good for plots with a large number of points, natural scenes or web based plots
The default graphics device is always the screen device
All of the mentioned
Explanation:
Bitmap formats are good for plots with a large number of points, natural scenes or web based plots.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which of the following function has parameters shown in the below figure?
par
bar
base
all of the mentioned
Explanation:
R makes it easy to combine multiple plots into one overall graph, using either the par( ) or layout( ) function.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is used to change active graphic device?
dev.set
dev.int
dev.win
all of the mentioned
Explanation:
You can change the active graphics device with dev.set(<integer>) where <integer> is the number associated with the graphics device you want to switch to.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Which of the following function displays currently active graphics device?
dev.present
dev.cur
pre.cur
all of the mentioned
Explanation:
You can change the active graphics device with dev.set.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following will copy the plot from one device to another?
dev.copy
dev.copypdf
dev.device
all of the mentioned
Explanation:
Copying a plot to another device can be useful because some plots require a lot of code and it can be a pain to type all that in again for a different device.