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When the constructor finishes execution, the new object of the class named Dsp002 has been created and occupies memory. The array objects contained in the new object have been populated with five different types ofdata. That data is available to be retrieved and plotted.

The getNmbr method

The class definition for the class named Dsp002 contains several more methods that I need to explain. For example, the getNmbr method for this class is exactly the same as for the class discussed earlier. Asbefore, it returns the integer value 5, telling the plotting program that there are five plots to be generated. This method is shown in Listing 15 .

Listing 15. The getNmbr method.
public int getNmbr(){ return 5;}//end getNmbr

The method named f1

The method named f1 is representative of all five of themethods named f1 through f5 in this class. Therefore, I will discuss only the first of the five methods in detail. Themethod named f1 is shown in its entirety in Listing 16 .

Listing 16. The method named f1.
public double f1(double x){ int index = (int)Math.round(x);if(index<0 || index>data.length-1){ return 0;}else{ return data[index]; }//end else}//end f1

In all five cases, the purpose of the method is to fetch and return a value from an array, where the incoming parameter will be converted to an array index.

Convert incoming parameter to an index

The incoming parameter is received as type double . However, an array must be indexed using type int . The first statement in the method calls the round method of the Math class to convert the double value to the nearest integer. That integer will be used as an array index.

Stay within array bounds

Following this, the method applies some logic to confirm that the index value is within the bounds of the array. If not, the method returns the value 0.

If the index is within the array bounds, the method retrieves and returns the value stored at that index location in the array.

And that's all there is to it.

Methods f2 through f5

Except for the scale factors applied to the data before returning it, the behavior of the methods named f2 through f5 is essentially the same as the behavior of the method named f1 . In each case, the method retrieves, scales, and returns a value previously storedin an array. Therefore, I won't discuss these other methods. You can view them in Listing 38 near the end of the module.

And that ends the definition of the class named Dsp002 .

The class named Convolve01

The entire class named Convolve01 is shown in Listing 17 .

If you already understand convolution, you will probably find the code in this class straightforward. If not, the code will probably still bestraightforward, but the reason for the code may be obscure.

Listing 17. The class named Convolve01.
class Convolve01{ public static void convolve(double[] data,int dataLen, double[]operator, int operatorLen,double[] output){//Apply the operator to the data, // dealing with the index// reversal required by // convolution.for(int i=0; i<dataLen-operatorLen;i++){ output[i]= 0; for(int j=operatorLen-1;j>=0; j--){output[i] +=data[i+j]*operator[j]; }//end inner loop}//end outer loop }//end convolve method}//end Class Convolve01

Questions & Answers

what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
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Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
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