Task:
Construct a frequency distribution with suitable class interval size of marks obtained by 50 students of a class are given below:
22, 51, 34, 39, 68, 69, 9, 37, 16, 48, 36, 27, 55, 59, 60, 59, 74, 80, 19, 29, 31, 69, 62, 60, 28, 67, 51, 73, 17, 24, 44, 45, 51, 66, 68, 72, 74, 41, 57, 41, 67, 51, 53, 23, 58, 34, 39, 48, 36, 79
Solution:
Arrange the marks in ascending order as Continue reading
In this guide I will show you how to create a program on Windows Forms which will help us to determine if the symbols that we input constitute a palindrome.
Let’s create a simple user interface:
Here we have a TextBox, Label, and Button. The message with the result of checking will be shown using MessageBox.
Double click the button “Check it” and go to the part of the code where we will perform the checking. Continue reading
Induction is a process of logical reasoning, based on the transition from private to general provisions. The famous “duck test” is a prime example of such a process: If it walks like a duck and quacks like a duck, it must be a duck. Continue reading
In the process of development, sometimes there’s a need to draw some interface elements manually. The Ncontrol component was created exactly for these purposes.
The library uses the NGraphics library to perform custom drawings to make it easy to build complex controls. The project is hosted on Github and is distributed under the MIT license. NControlView can be used both to do custom drawings and to create complex custom controls.
To make a long story short, it’s a rendering visualization mechanism on top of the standard mechanisms in iOS, Android, and Windows Phone. Continue reading
Hello! Today I want to show you how to create, start and stop simple service in Android OS.
Thus, the service is a certain task that runs in the background and does not use UI. The service can be started and stopped from applications and other services. Also, you can connect to the running service and interact with it. Continue reading
Theory
Heap Sort is classical algorithm which, perhaps any programmer should know. This sorting algorithm is notable for the fact that regardless of the data set it has one and the same complexity time – O (n log n). Continue reading
Naive Bayes classifier is one of the easiest classification algorithms. However, very often it works even better than the more complex algorithms. I want to share the C# code and a description of how it all works.
And so, for example, I will take the problem of determining the type of the vehicle using it’s dimensions. Of course, to determine the type, you can create a large list of vehicles. But this list, in any case will never be comprehensive. In order to solve this problem, you can “train” a model for the marked name. Continue reading
Readme file is a small document, which is usually attached to the program. Readme files are written by software developers and contain basic information about the program, including the info about the installation or management of the system settings, contact information, license, gratitude, and information about the software version. To distribute the software it is important to know how to write the Readme file. Poorly written Readme document can be frustrating, tiring for the user, while a good one will help him to easily learn the basic information about your program. Continue reading
Create new MS SQL database. In this database, create a table called “store” with the following information:
Apples provided by Sunshine Ltd: 3.08 (expiration date 2016.07.20) Apples provided by NewFood: 3.88 (expiration date 2016.07.30) Apples provided by FreshGoods: 2.53 (expiration date 2016.06.25) Potatoes provided by Sunshine Ltd: 1.61 (expiration date 2016.10.01) Potatoes provided by NewFood: 2.01 (expiration date 2016.12.11) Tomatoes provided by Sunshine Ltd: 3.65 (expiration date 2016.05.20) Tomatoes provided by NewFood: 5.30 (expiration date 2016.05.25) Eggs (pack of 12) provided by Sunshine Ltd: 4.59 (expiration date 2016.06.13) Eggs (pack of 12) provided by FreshGoods: 3.13 (expiration date 2016.06.01) Carrots provided by Sunshine Ltd: 2.50 (expiration date 2016.08.22) Carrots provided by FreshGoods: 3.30 (expiration date 2016.07.30) Carrots provided by NewFood: 2.80 (expiration date 2016.08.10) Onions provided by NewFood: 1.95 (expiration date 2016.05.20) Onions provided by FreshGoods: 1.35 (expiration date 2016.05.10) Onions provided by FreshFoods: 5.25 (expiration date 2016.05.25) Plastic bags provided by Sunshine Ltd: 0.10 (no expiration date) Paper bags provided by PaperFactory Ltd: 0.15 (no expiration date) Paper bags provided by FreshMoods: 0.20 (no expiration date) Handkerchiefs provided by FreshMoods: 0.30 (no expiration date)
Create new Android application which shows a Happy New Year congratulation message and appropriate background picture. When the text corresponding to a family member getting congratulated is being clicked on by the user, it should respond with switching to a different family member (i.e. father, mother, brother, grandfather). Continue reading