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Matrix of Plots:
The other function which is very useful with any type of plot is subplot that creates a matrix of plots in the present Figure Window. The three arguments are passed to it in the form subplot(r,c,n); here r & c are the dimensions of the matrix and n is the number of the specific plot within this matrix. The plots are numbered row wise beginning in the upper left corner. In most cases, it is helpful to create a subplot in a for loop therefore the loop variable can iterate through the integers 1 through n. Whenever the subplot function is called in a loop, then the first two arguments will always be similar as they give the dimensions of the matrix. The third argument iterate through the numbers assigned to the elements of matrix. Whenever the subplot function is called, it made that element the active plot; then, any plot function can be used to complete with axis labeling, titles, and like in that element.
For illustration, the subplot below shows the distinction, in one Figure Window, between using 10 points &20 points to plot sin(x) between 0 and 2 *π . The subplot function generates a 1 × 2 row vector of plots in the Figure Window, and hence the two plots are shown side-by-side. The loop variable i iterates throughout the values 1 and then 2. The first time throughout the loop, whenever i have the value 1, 10*1 or 10 points are used, and the value of third argument to the subplot function is 1. The second time throughout the loop, 20 points are used and third argument to subplot is 2. Note that the sprintf is used to print how many points were used in the plot titles. The resultant figure Window with both plots is a shown in the figure.
Histogram: The histogram is a particular type of bar chart which shows the frequency of occurrence of the values within a vector. The Histograms use what are known as bins to
Function fopen - file function: The permission string in the call to the fopen function identifies that the file is opened for writing to it. Just as when reading from a file,
User input in the while loop: Here is an illustration of running this script: >> readonenum Enter a positive number: -5 Invalid! Enter a positive number: -2.2
Counting in a While Loop: Whenever it is not known ahead of the time how many values will be entered into the script, it is often essential to count the number of values which
Illustration of Variance For illustration, for the vector [4, 6, 1, 5], there are n = 4 values therefore n - 1 is 3. The mean of this data set is also 4. The variance will be
Refer the subset of a matrix: It is also possible to refer to the subset of a matrix. For illustration, this refers to the first & second rows, second & third columns: >> m
Example of Minimum and Maximum Value For matrices, the functions min and max operate column wise by the default: >> mat = randint(2,4,[1 20]) mat = 9 10 1
Plot types: Besides plot and bar, there are another plot types like stem plots, histograms, stem plots, area plots and pie charts, and also other functions which customize the
Polar Form: Any complex number z = a + bi can be thought of as a point (a,b) or vector in the complex plane in which the horizontal axis is the real part of z, and the vertica
Illustration of Minimum and Maximum Value Both of these functions also return the index of the minimum or maximum value; when there is more than one occurrence, it returns the
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