<< Chapter < Page
  Digital signal processing - dsp     Page 19 / 27
Chapter >> Page >

End of the PlotALot01 class

Listing 26 also signals the end of the overridden paint method, the end of the MyCanvas class, the end of the Page class, and the end of the PlotALot01 class. In short, Listing 26 signals the end of the class under discussion.

The class named PlotALot02

Much of the code in this class is very similar to the code in the class named PlotALot01 . Therefore, the discussion of this class will be much briefer than the earlier discussion of the class named PlotALot01 .

Designed for two-channel data

This class is an update to the class named PlotALot01 . This class is designed to plot large amounts of data for two channels on the same axes as shown in Figure 2 . One set of data is plotted using the color black. The other set of data is plotted using the color red.

As is the case for the class named PlotALot01 , this class provides a main method so that the class can be run as an application in self-test mode.

Three steps to use the class

As before, there are three steps involved in the use of this class for plotting data:

  1. Instantiate a plotting object of type PlotALot02 .
  2. Feed pairs of data values to the plotting object by calling the feedData method once for each pair of data values. The first value in the pair willbe plotted in black. The second value in the pair will be plotted in red.
  3. Call the plotData method on the plotting object after all of the data has been fed to the object. This causes all of the data to be plotted. Italso causes the pages to be rearranged placing page 0 on the top of the stack.

A stack of page objects

The class produces a graphic output consisting of a stack of Page objects on the screen. Each Page object contains one or more horizontal axes on which the data is plotted as shown in Figure 2 . The two data sets are superimposed on the same axes with the data from one data set being plotted in black and the datafrom the other data set being plotted in red.

Testing with the main method

For test purposes, the main method instantiates a single plotting object and feeds two data sets to that plotting object. As before, the data that is fed tothe plotting object is white random noise. One of the data sets is the sequence of values obtained from a random number generator. The other data set is thesame as the first except that the sign of each data values is reversed.

Some data is not random

Also as before, and for the same reason, fifteen of the data values for eachdata set are not random. The non-random data values are the same as in the main method for the class named PlotALot01 . Figure 2 illustrates how these fifteen specific values are used to confirm the proper transition from the end of onetrace to the beginning of the next trace, and also to confirm the proper transition from the end of one page to the beginning of the next page.

The class named PlotALot02 and the main method

As before, I will discuss this class in fragments. A complete listing of the class is provided in Listing 36 near the end of the module. However, because much of the code in this class is very similar to code that I explained for theclass named PlotALot01 , this discussion of the code will be much briefer. I will highlight those aspects of this code that are different from the code in PlotALot01 .

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Digital signal processing - dsp' conversation and receive update notifications?

Ask