Characters and encoding, MATLAB Programming

Characters and Encoding:

A character in a MATLAB is represented by using single quotes (example, 'a' or 'x'). The quotes are essential to denote a character; without them, the letter would be interpreted as the variable name. The Characters are place in an order using what is termed as a character encoding. In character encoding, all characters in the computer's character set are placed in a sequence and given equal integer values. The character set involves all letters of the alphabet, punctuation marks, digits, and more; mainly, all the keys on a keyboard are characters. Special characters like the Enter key are also included. Therefore, 'x', '!', and '3' are all characters. With the quotes, '3' is a character, not a number. The most general character encoding is the American Standard Code for Information Interchange, or ASCII. The standard ASCII has 128 characters that have equivalent integer values from 0 to 127. The first 32 (i.e.integer values 0 through 31) are nonprinting characters. The letters of the alphabet is in order that means 'a' comes before 'b, then c,' and so on.

The numeric functions can be used to convert a character to its equal numeric value (example, double will convert to the double value; int32 will convert to an integer value using the 32 bits, etc.). For illustration, to convert the character 'a' to its numeric equivalent, the statement below could be used:

>> numequiv = double('a')

numequiv =

97

This stores the double value 97 in the variable numequiv that shows that the character 'a' is the ninety-eighth character in the character encoding (as the equivalent numbers start at 0). It doesn't matter which number type is used to convert 'a', for illustration,

>> numequiv = int32('a')

would also store the integer value 97 in the variable numequiv. The only dissimilarity between these will be the type of the resulting variable (double in the first case, int32 in the second case).

Posted Date: 10/18/2012 4:06:47 AM | Location : United States







Related Discussions:- Characters and encoding, Assignment Help, Ask Question on Characters and encoding, Get Answer, Expert's Help, Characters and encoding Discussions

Write discussion on Characters and encoding
Your posts are moderated
Related Questions
Solve the optimality condition for each P equation against M according to the following relation: Condition for Optimality:         ∇ M = λ ∇ P      with respect to C and T.

Run the MATLAB script sum = single(0); term = single(1); n=1; while sum + term > sum sum = sum+term; n=n+1; term = 1/n; end n Explain what you think it is trying to do. What wou

Q. An expression for a sawtooth wave over the internal 0 ≤ t ≤ T0 is given by f(t) = At/T0. The student is encouraged to check the Fourier coefficients to be a 0 = A/2, an = 0 for

Ant Colony Optimization for Optimization of Route path taken Ant Colony Algorithm is a potential candidate for coupled, 3D optimisation. Ant Colony Algorithm enjoys the overall

1) Identify an equation that describes some chemical process.  Your equation should have at least two parameters, at least one of which should contribute in a non-linear way. He

how to find absolute value of a number

Read in any non jpeg image (any image will do) . Save it as a jpeg at quality levels (70, 60,50,40, 30) Get the MSE for each quality level as compared to the orignal file Get the

Use the MATLAB randn function to generate 1000 points for x. Generate the output of the unknown system with the ?lter function and b=[1232 1] and a=[1]. Normalise the ?lter output

Diary Files: Before doing this assignment, please read the document Notes on Matlab Assignments (available from the course web page). It describes how to record the results of your

Reading from a File: A file has been once created; it can be read into a matrix variable. When the file is a data file, the load function will read from the file filename.ext