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if you have never used
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matlab before this demo will get you
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and show you where to go next to
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get more information the matlab language
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allows you to construct commands to
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create and manipulate variables
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variables can be created by typing
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them into the command window for example
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a equals one b equals two c
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equals a + b or d equals cosine
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and the basis of the matlab language is arrays
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and variables can be vectors and
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matrices or n-dimensional arrays you can
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use square brackets to
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construct arrays to create a
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victor string you can write t equals
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you can use the operator: to
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simplify the creation of arrays with evenly
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spaced elements p equals from
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you can repeat a previously entered command
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by pressing the up arrow commands you can
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for example make it so that you change
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from 0 to 1 in steps 001 semicolon at the
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end of the command
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suppresses the output of the results commands in the
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command window to see what
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variables have already been created, use the
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hooves command or you can look at the
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list of variables in the browser of the
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matlab workspace to see
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the value of the variable just write the name for
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operations on vectors the same way as we do with simple scalars
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for example y equals sine 2 multiplied by
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this expression uses the constant pi
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pride defined in matlab you can
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plot a graph using the command plot
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y from t in matlab the changes can be
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to specify the imaginary part a symbol is used
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and for example x is equal to 3 plus 4 and
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matrices can be entered
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using a semicolon in as
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follows, a equals 1 2 3 4 5 6 7 8 10
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or you can use functions
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to see the list of matlab functions you can
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click on the icon next to the command
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and then find the desired function in one of the
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such as mathematics random
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number generation we will create a matrix
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with random data double clicking on the
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name of a function
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puts it min on the command line after
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writing the opening parenthesis a
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tooltip appears showing the
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possible input arguments of the function we will
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hand over a matrix of 5 rows and 5 columns
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you can access all of
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matlab in the documentation by clicking on the question
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mark on the toolbar in the
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you can either you can navigate through the
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information or search for the information you need, you can
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introductory documentation by selecting the
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getting started section in the matlab documentation, you can
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find out the size of the matrix using the
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says command, for example, the size of the matrix
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and the size of all variables
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is displayed in the workspace browser,
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matrix operations, for example, b equals
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a transposed or c equals a
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multiplied by b which performs
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matrix multiplication or c equals a .
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multiply by b which does
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element-by-element and multiplication when the
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corresponding elements of the matrices are multiplied, you
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can find the inverse matrix for a and
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multiply it by the matrix a itself to
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confirm that we get the identity
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matrix, elements or sections of the array
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can be selected using array indexing for the array,
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but here is its value in the second row,
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or for a variable, yes, this is a section that
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rows from the first to the third and columns from
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the second to the last, in the same way
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you can assign values, for example,
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for the variable data, you can set rows
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1 to 2 y and all columns equal to zero
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operator: used by itself by itself, when
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indexing, denotes all elements of the
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array, in this case, all columns,
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please note that indexing
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matlab arrays starting from one, you can
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also use matrices when
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plotting graphs, let you need to
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display the matrix w defined as the
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product of the transposed vector y by
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where y is the sinusoid that we
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defined above you can run the command
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surf w which creates a surface graph
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this concludes this demo you
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can try some of these
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examples could now or watch
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one of the following videos
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