How do you find the local maxima of a matrix in Matlab?

How do you find the local maxima of a matrix in Matlab?

TF = islocalmax( A ) returns a logical array whose elements are 1 ( true ) when a local maximum is detected in the corresponding element of an array, table, or timetable. TF = islocalmax( A , dim ) specifies the dimension of A to operate along. For example, islocalmax(A,2) finds local maxima of each row of a matrix A .

How do you find the maximum peak value in Matlab?

Use findpeaks with default settings to find the peaks of the signal and their locations. [pks,locs] = findpeaks(PeakSig,x); Plot the peaks using findpeaks and label them. Sort the peaks from tallest to shortest.

How do you find the maximum of a plot in Matlab?

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  1. maxF = max(F); % Find max value over all elements.
  2. indexOfFirstMax = find(F == maxF, 1, ‘first’); % Get first element that is the max.
  3. % Get the x and y values at that index.
  4. maxY = F(indexOfFirstMax);
  5. maxX = x(indexOfFirstMax);

How do you find the minimum value in Matlab?

M = min( A ) returns the minimum elements of an array.

  1. If A is a vector, then min(A) returns the minimum of A .
  2. If A is a matrix, then min(A) is a row vector containing the minimum value of each column.

How do you find the maximum value of a plot?

Again, using this graph, you can see that the maximum point of the graph is at y = 5. The second way to determine the maximum value is using the equation y = ax2 + bx + c. If your equation is in the form ax2 + bx + c, you can find the maximum by using the equation: max = c – (b2 / 4a).

How do you find the minimum point in MATLAB?

How do I find the local maxima of a matrix?

For example, islocalmax (A,2) finds local maxima of each row of a matrix A. TF = islocalmax ( ___,Name,Value) specifies additional parameters for finding local maxima using one or more name-value pair arguments.

How to get the maximum value from an array in MATLAB?

The max () function in MATLAB gets the maximum value from a given array or matrix. In the case of an array, it will return the value of the maximum value present in that array along with its index.

How do you get maximum peak width in MATLAB?

Maximum peak width, specified as the comma-separated pair consisting of ‘MaxPeakWidth’ and a positive real scalar. Use this argument to select only those peaks that have widths of at most ‘MaxPeakWidth’. If you specify a location vector, x , then ‘MaxPeakWidth’ must be expressed in terms of x.

How to plot the maxima of a vector of data?

Compute the local maxima of a vector of data and their prominence, and then plot them with the data. Compute only the most prominent maximum in the data by specifying a minimum prominence requirement. Input data, specified as a vector, matrix, multidimensional array, table, or timetable. Operating dimension, specified as a positive integer scalar.