Question

How to determine and adjust the x axis after taking the 1D FFT?

I am trying to take an FFT, but have trouble figuring out the x axis. The time vector is of length N = 100000. The vector has un...

6 mois il y a | 2 réponses | 0

Question

Sorting a string according to the values of a vector of type double

I have a vector A with numbers of type double. Two of the values of A are the same, e.g., A = [1.1 2.3 4.4 2.3 5.1]; I als...

6 mois il y a | 2 réponses | 0

Question

Finding a value of one vector based on the nonzero values of another vector

Given two vectors, how do you determine the value of A where B is 1? In this case, A=[5 4]. How do I do this? A = [2 5 1 4]; ...

6 mois il y a | 3 réponses | 0

Question

Ordering vectors of numbers of type double and strings according to another vector

How do I order the following arrays? vector_1 = [1 3 7 8 9 10]; string_1 = {'apples' 'pears' 'plums' 'oranges' 'peaches' 'gr...

6 mois il y a | 2 réponses | 0

Question

Printing special characters in an axis label

How do you print special character(s) using sprintf? I want to use this or similar to add special characters to an axis label as...

6 mois il y a | 1 réponse | 0

Question

Modify axis label for each plot within loop

I am generating plots for a series of values using a for loop and wish to output the value in the axis label. How do I do that? ...

6 mois il y a | 1 réponse | 0

Question

Working with a cell of strings

I have a large N x 1 array of cells, each cell containing a string. How do I convert this to a string array, or to a cell array ...

6 mois il y a | 1 réponse | 0

Question

Rounding a decimal down

With round(x,2) I can round a number to the nearest hundredth, but how do I round down to the nearest hundredth? For example, bo...

6 mois il y a | 3 réponses | 0

Question

Padding a cell array?

How do you pad every other element of a cell array with a blank value thereby doubling the length of the cell?

6 mois il y a | 1 réponse | 0

Question

Error bars with categorical data type

I am trying to plot error bars in y for data that are categorial type in x. I get an error message saying Error argument 'err...

6 mois il y a | 1 réponse | 0

Question

Finding min and max values in a structure

For a 1x1 structure with multiple fields, each field consisting of a cell of numbers, how can you find the minimum and maximum v...

6 mois il y a | 3 réponses | 0

Question

Rounding down when doing division in Matlab

How do you round when dividing such that 1/7 = 1 2/7 = 1 ... 7/7 = 1 8/7 = 2 ... 14/7 = 2 15/7 = 3 etc.

6 mois il y a | 1 réponse | 0

Question

Differences in power law fit vs. linear fit on log-log scale

I am fitting data using cftool to a power law, i.e. , and comparing it to the 1st-order polynomial fit, i.e. when I take the ba...

6 mois il y a | 2 réponses | 0

Question

Analyzing different sections of an array

How do you analyze the first 10 columns of an array (all rows) and columns 11-20, 21-30, and so on, separately?

6 mois il y a | 1 réponse | 0

Question

Reshaping a cell array

I have a cell of cells, where each internal cell is a vector of numbers of type double. How can I reshape this in a less cumbers...

7 mois il y a | 1 réponse | 0

Question

Replacing part of an array with another

How do I replace the diagonal of one 2d array with the diagonal of another? The arrays have the same size.

7 mois il y a | 1 réponse | 0

Question

Duplicating an entire vector

How do you duplicate an entire vector? For example: A=[1 2 3 4]; How do I get the following? 1 2 3 4 1 2 3 4 1 2 3 4 ...

7 mois il y a | 2 réponses | 0

Question

Generating the laplacian for a sub-graph that still reflects the connectivity of the overall graph

Generating a sub-graph I think by convention breaks all edges between the sub-graph and the rest of the graph. Is it possible to...

7 mois il y a | 1 réponse | 0

Question

How do you remove non-integer values from a colorbar?

My image only has integer values, so including the non-integer values in the colorbar is something I'd like to not do.

9 mois il y a | 2 réponses | 0

Question

How do you remove tick marks (not labels) from a colorbar?

I have a figure plotted with imagesc and the associated colorbar. How do I remove the tick marks from the colorbar?

9 mois il y a | 2 réponses | 0

Question

How do I make a red and blue colormap?

I can plot a matrix of integers using imagesc. How do I make a discrete colormap (i.e., only for the integers) with a gradient o...

9 mois il y a | 1 réponse | 0

Question

Padding a vector with zeros

How do I pad a vector of type double so that there are say 5 elements with zeros after every 3rd element in the original vector?...

9 mois il y a | 1 réponse | 0

Question

How do I take the average of elements of a vector depending on the values of another vector?

Given two vectors, how do I take the average of values in one vector depending on what the value is in the second vector? For...

10 mois il y a | 2 réponses | 0

Question

How do I insert one array into another?

I have two arrays with elements of type double. I want to insert the 1st column of array 2 after the 1st column of array 1, the ...

10 mois il y a | 1 réponse | 0

Question

Cell array to double array?

I have a cell array with each element a vector of type double. How do I convert this to an array of type double?

10 mois il y a | 1 réponse | 0

Question

Removing the suffix from a variable name

I have many variables all called something like A_YYY where YYY can be any combination of characters and numbers of different le...

11 mois il y a | 1 réponse | 0

Question

Replacing values in array with values from another array

The values in each row of an array correspond to the values i, j of an upper triangular array. How do I return a vector with ele...

11 mois il y a | 1 réponse | 0

Question

Replacing elements in a vector

The values of an array match the index of elements in a vector. For example, the value of 5 in array1 below corresponds to whate...

11 mois il y a | 2 réponses | 0

Question

How do you get all pairs without double counting?

Given, say, 10 numbers, how do you get all possible pairs between the numbers without double counting? Order doesn't matter, so ...

11 mois il y a | 1 réponse | 0

Question

Geometric mean with logarithmically spaced data?

This is partly a Matlab question, partly conceptual. I generated three vectors with logarithmically spaced numbers using logspac...

11 mois il y a | 1 réponse | 0