How to find the max, the min, and the mid value without. Thus, linear indexing numbers the elements in the columns from top to bottom, left to right. Note that if there is a tie for the minimum value in each column, matlab chooses the first element in the column. Matlab, find index of minimum value with the condition that it must be negative. In older matlab version this was faster than calling min and max separately, but modern matlab versions are more. Matlab treats the array as a single column vector with each column appended to the bottom of the previous column. For example, in my case that function should return 7 as the maximum value and 4 as the index. If no value is specified, then the default is the first array dimension whose size does not equal 1. Finding index for minimum value in array matlab answers.
Learn more about min, multidimensional min, multidimensional max. If x is a multidimensional array, then find returns a column vector of the linear indices of the result. Solution was arrived at by traversing the array by value you were looking for. Learn more about maximum, minimum, max, min, index, array, matrix, find, location, deep learning vs. How to find minimum or maximum value matlab answers. Store the row and column return from find and put it in the match cell array. Follow 5,006 views last 30 days chiranjibi on 25 aug 2014. What is the function returning the maximum value and its index. How to get index of matrix after max and min matlab answers. As an alternative version, combine min to get the minimum value and find to return the index, if youve already calculated the minimum then just use find. I have a 3d matrix, and i would like to find the index to the minimum value along the 3rd dimension. Find value in cell array and return index matlab answers. I need to find the index for the minimum value in pbest other than 0.
But if you want to extract row and column you just need to adapt the code jan gave you. Mathworks is the leading developer of mathematical computing. How can i find the maximum value and its index in array in matlab. The min and max functions in matlab return the index of the minimum and maximum values, respectively, as an optional second output argument. Sep 02, 2016 the problem is that this will index all of the 1s. How to find the max, the min, and the mid value without using. Dimension dim indicates the dimension whose length reduces to 1. Index for array max or min in simulink without variable. How to find the index of the closest value to some number in. To get the rows and columns instead of linear indexes, you can use ind2subs or find. Learn more about minimum, min, 2d, matrix, indices. Learn more about matlab, array, find, indexing, index matlab. How to calculate index of minimum value in cell array matlab. I am sure this is so simple but i cant work it out.
Learn more about partial derivative, minimum positive value, matrix, for loop matlab. Trial software how to find the minmax value and its index in a multidimensional matrix. I know i can use min function but this only gives one smallest value. Mathworks is the leading developer of mathematical computing software. Find nearest value to specific number matlab answers. May 09, 2017 how to calculate index of minimum value in cell array.
In matlab, by the function min, one can get only one single minimum element of a matrix, even if there can be several equal minimum. To find array elements that meet a condition, use find in conjunction with a relational expression. I need to get the index associated with the first maximum or minimum value in the array. Find the index of given value in an array matlab answers. Suppose that we want to assign a number of students, each one should be assigned to a numerical grade. Find the index value of first and last element in the vector. Store the row and column return from find and put it.
Learn more about maximum, minimum, matrix, rain, rainfall rate, image processing. What i want is to get the indices of the smallest number starting from the end of each row. If sizea,dim is 0, then maxa,dim returns an empty array with the same. Find indices and values of nonzero elements matlab find. Find closest value in array matlab answers matlab central. The find command only returns the indices of all the nonzero elements of a matrix. Minimum value,row and column matlab answers matlab. Note that there can be the max value at more than one location. How do i get both the minimum of a 2d matrix and its. How do i find the indices of the maximum or minimum value. How to find out the minimum positive value of 100x100x100.
May 16, 2011 suppose that we want to assign a number of students, each one should be assigned to a numerical grade. To find the maximum value in a matrix learn more about matrix matlab. If sizea,dim is 0, then min a,dim returns an empty array with the same. I want to find the minimum value learn more about min. Jul 24, 2018 how to find out the minimum positive value of. Learn more how to get matlab to display the row index of the minimum value in every column of a matrix. I have a 586 array where the columns are the variables and the rows are the samples that represent a time series of eeg data sampled at 256 hz. If x contains no nonzero elements or is empty, then find returns an empty array. How to find the index of the closest value to some number.
May 06, 2014 i need to find the index for the minimum value in pbest other than 0. The sizem,dim is 1, while the sizes of all other dimensions remain the same, unless sizea,dim is 0. Replace the 1 in the min command by a running index to step through each row, e. Learn more about find, nearest, closest, index, specific, certain, value, array. Find min value in 4d matrix and index of min value. Maximum elements of an array matlab max mathworks nordic. Mathworks is the leading developer of mathematical computing software for. Learn more about maximum, minimum, max, min, index, array, matrix, find. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. Is there any other way to find the min value other than zero and also to find its index. I got the value using the following code but i have the nan value in pbest in loops it is giving errors. Minimum value,row and column matlab answers matlab central.
For your requirement, you will have to 1 find the maxvalue first and then. This is not as convenient as interp1 but should be faster 0 comments. If a is a matrix, then mina is a row vector containing the minimum value of each column. How do i find the indices of the maximum or minimum.
If x is a vector, then find returns a vector with the same orientation as x. Finding the indices of the elements of one array in another. How would one find the minimum value in each row, and also the index of the minimum value. Hi all, i have to find the index of the same value in an array,see the following example. For example, the following code produces a row vector m that contains the maximum value of each column of a, which is 3 for the first column and 4 for the second column. So as i understand you want to find the max value for each 16 rows. Arduino forum has discussed finding the index once you know which values index you want. Pramod kumar jangir on 20 oct 2019 accepted answer. Giving what people call a minimum working example is fine, but it needs to have the full complexity of what you actually want to know still, otherwise its of no use.
I have a matrix and i want to compare three element of this matrix and find min between them and then i want to know the column number of. Apr 15, 2015 if the min value occurs at, say, 10 places in your matrix, which of the 10 locations do you want returned. How to find first min value and index it matlab answers. If the min value occurs at, say, 10 places in your matrix, which of the 10 locations do you want returned. How do i find the indices of the maximum or minimum value of my. In older matlab version this was faster than calling min and max.
If you know for a fact that there is only one, then you can use either jans or my solution the difference is how to handle it when the min occurs at multiple locations. If a is a vector, then mina returns the minimum of a if a is a matrix, then mina is a row vector containing the minimum value of each column if a is a multidimensional array, then mina operates along the first array dimension whose size does not equal 1, treating the elements as vectors. Calculate with arrays that have more rows than fit in memory. How to calculate index of minimum value in cell array. Follow 26 views last 30 days jyothi alugolu on 9 may 2017.
Learn more about maximum in a matrix, matrix, maximum. How to find index of a minimum value starting from the. This is not as convenient as interp1 but should be faster. Oct 05, 2018 if i know thw column is 1 and min value is 206 how would i find row index. How do i find a minmax value within a defined range for. Finding the indices of all minimum elements in a matrix matlab. Oct 07, 2009 how do i find the indices of the maximum or. Finding index to minimum values in 3d array matlab answers. The user is the one who should choose the number of the students, and then he should be able to calculate the average of the grades, the max value, the min value, and the mid value, each one of the last three requirements should their rank position be specified. P, you can find the minmax of the entire matrix in one line as follows. Minimum elements of an array matlab min mathworks deutschland.
I need to get the index associated with the first maximum or minimum value in the. Finding 2nd minimum value in an array matlab answers. I have an array, i need to be able to select 2, or 4 or so on n minimum smallest values from the specific array. Find the index value of first and last element in the. I need to find out the minimum value of the matrix and the corresponding row and column index. Mathworks is the leading developer of mathematical computing software for engineers and scientists. Follow 349 views last 30 days roberto verrelli on 28 jan 2014. Follow 3 637 views last 30 days jens keijser on 5 jan 2018. A linear index allows use of a single subscript to index into an array, such as ak.