## What is an index value in matlab

10 Sep 2019 sub2ind Get values of 3D matrix using an index Learn more about sub2ind, matrix, 3d matrix, 2d matrix. I've stored the index of the elements of interest in an array, B, and would like to use the values in B to obtain the values of the elements in another array, A, It means you have specified an index value greater than the limit of your matrix assigned dimensions. For example a "for statement doing 10 loops and you The function is max . To obtain the first maximum value you should do [val, idx] = max(a);. val is the maximum value and idx is its index. You can access the Index value using the output you get when you load the image, for instance if you store the image data in a structure called s:

## It means you have specified an index value greater than the limit of your matrix assigned dimensions. For example a "for statement doing 10 loops and you

find. Find indices and values of nonzero elements. Syntax. k = find(x) [i , j] = find(X ) [i , j , v] = find(X). Description. k = find(X) returns the indices of the array X that where a is the maximum value of the vector and b is the index of that value. The MATLAB function min is exactly parallel to max: >> min(z). ans = -9. sum and The index gives equal weight to false positive and false negative values, so all tests with the same value of the index give the same proportion of total misclassified Combines multi-timescales aspects of the Standardized Precipitation Index (SPI) with Spatial distribution of 3-month SPEI values in August 2003 from the SPEI 4 days ago 6.7 MATLAB; 6.8 Mono applications; 6.9 NetBeans; 6.10 Skype; 6.11 Slack Devices > Displays > Scale and choose an appropriate value. Linear Indices. A linear index allows use of a single subscript to index into an array, such as A(k). MATLAB ® treats the array as a single column vector with each column appended to the bottom of the previous column. Thus, linear indexing numbers the elements in the columns from top to bottom, left to right. % index vectors for rows and columns p = 1:m; q = 1:n; % index matrices for rows and columns [P, Q] = ndgrid(p, q); % create a matrix with the shift values K = repmat(k(:), [1 n]); % update the matrix with the column indexes Q = 1 + mod(Q+K, n); % create matrix of linear indexes ind = sub2ind([m n], P, Q); % finally, create the output matrix B = A(ind);

### I've stored the index of the elements of interest in an array, B, and would like to use the values in B to obtain the values of the elements in another array, A,

The latter solution should work in both cases. Observe that the index for a non-existent median is not a proper index at all and you should use the value accordingly (for whatever you might want to do with it). For example, x is a column vector and its dimensions are [5 1], which means that its second dimension is a singleton. Consequently, the following two statements are equivalent. In the second statement, all the rows of x are displayed in addition to the first (and only) column of x . So I have indices corresponding to values that I want. Is there a MATLAB function that would allow me to output the values when I input the indices of those values? 5 Comments. If k is the index, then A(k) is the value of A at index k. What else are you looking for? How do I find first index of a value in an array?. Learn more about index, indexing, matlab function, homework Interesting! I don't have the stats toolbox, and I've never seen either of those 2 functions before. It seems simple enough. I briefly tried playing around with the delaunayn function, and it seems it wouldn't work if 2 elements in the array were equal. A(2,3) and A(i) refer to the same element in a matrix A. In MATLAB you can index matrices linearly. Suppose you have the matrix: Now, you can access the element in position (3,2) either using normal subscripts, or using the linear equivalent.

### So I have indices corresponding to values that I want. Is there a MATLAB function that would allow me to output the values when I input the indices of those

How I can find index of element in array? Follow 8,336 views (last 30 days) 2017 Accepted Answer: James Tursa. I know, that number, for example, 5, is an element in array X, but I don't know it's index. In Python, I can use: X.index(5) I realized this function, using for loop and if statement, but did Matlab doesn't have build-in similar

## Combines multi-timescales aspects of the Standardized Precipitation Index (SPI) with Spatial distribution of 3-month SPEI values in August 2003 from the SPEI

I use Max_value_Force and Min_value_Force to find the max and min values then I find where they are indexed. I then take the index and go back to my data and find when the force was min and max. After that I want to plot ALL the values between the max and min times as a plot with time (t) vs force (f). The latter solution should work in both cases. Observe that the index for a non-existent median is not a proper index at all and you should use the value accordingly (for whatever you might want to do with it).

mwIndex is a type that represents index values, such as indices into arrays. Use this function for cross-platform flexibility. By default, mwIndex is equivalent to I need to efficiently find the indices for all of the unique elements in the matrix. Then we find the markers - where the value changes, plus the endpoints. The "other" right answer is to define a class that stores both index values & result values. This is more work, but allows you to have noninteger indexing. 10 Sep 2019 sub2ind Get values of 3D matrix using an index Learn more about sub2ind, matrix, 3d matrix, 2d matrix. I've stored the index of the elements of interest in an array, B, and would like to use the values in B to obtain the values of the elements in another array, A, It means you have specified an index value greater than the limit of your matrix assigned dimensions. For example a "for statement doing 10 loops and you The function is max . To obtain the first maximum value you should do [val, idx] = max(a);. val is the maximum value and idx is its index.