I am new to matlab. I have one question about datatypes.
I have an array of the cell array type. In the variables window it shows me it as 190x1 double.
I have two questions.
What is the purpose of the cell array type if there is the matrix type ?
How to append another similar array to the column of an existing array. For example I have two arrays 190x1 double I wan't a new array to be 380x1 double
I would be grateful for any help.
Thanks
I'd encourage you to browse the documentation for cell arrays. One of the most common uses as it states is mixed size or mixed type data...among other uses.
Cell arrays commonly contain either lists of text strings,
combinations of text and numbers, or numeric arrays of different
sizes.
To append two arrays you could do this. It will place the two vectors end to end.
X=ones(190,1);
X =[X; X];
Related
How does one generate an array whose elements are cell values or math operation of cell values? For example, how does one generate an array of {0,1,A1,B1}) or {8,3,A1/B1,A1*B1} or {0,1,A1/B1-2, A1*B1+3}?
I have not found anything on the net regarding this topic.
I need to store multiple measurements which are contained in arrays of variable elements size (their datatype is double ) in an single array so as to use a specific matlab function . The input of this function has to be an array so I can't use the Cell data type and I know that by definition you can't have a different number of elements in different slices of the same dimensions . So my quetion is do you have a suggestion of having an array of arrays of variable size in Matlab without using Cell ?
Thank you .
I wrote several cell arrays I read from txt-files in cell arrays within the MATLAB Workspace. I wrote a cell array 'Names', containing the names of the other cell arrays I assigned. The txt-files can have varying names, therfore I want to use this dynamic naming.
Now I would like to the cell arrays dynamically by using the name (string) from 'Names'. Is this possible? Which syntax do I have to use?
Logically Names{i} gives back the name of the cell array in position i. However using Names{i}.n does not work.
I could not find anything in the MATLAB documentation either..
I have a struct array imported from a tab file, with 100+ name\double rows. The first row has a character value (name\char). I'm trying to load this as a matrix and converted it to cells, removing the top row entirely.
But when I use cell2mat(array), it has the error:
All contents of the input cell array must be of the same data type.
I know this is from the Names vs. double columns. But is there a way to convert this to a matrix? Or, if the data is rows of
name | 1000x1 double
is it better just to leave this as a cell array?
It's not possible to have a matrix containing both strings and numeric values. If you want something like that, cell array is your only option. But, it will be very limiting if you want to process the numeric values using matrix/vector operations, or functions that expect matrices/vectors as input. One option would be to store the strings and numeric data separately; keep the strings in a cell array S and the numeric data in a matrix M. Then, keep track of the elements. For example, S{i} and row M(i, :) could both correspond to entry i from your original table. Another option would be to make your own data structure using struct(), which can contain both strings and numeric values.
The correct words are not coming to my mouth as yet so please tell what I should have asked to make the question clear.
I have a cell array (1x12) with each cell having the size (65536x1). I want to have a matrix which has the dimensions (65536x12). In short, I want to convert (1x12) cell, with each cell having (65536x1) values, to a matrix with (65536x12) values.
example
I want to do above programmatically using Matlab but couldn't find any solution. (probably because I am not searching using correct words).
Try cell2mat
output = cell2mat(inputImagesCell)
You also misunderstood what a "cell array" is, edited your question, maybe it is clearer now. A cell array is an array of cells. inputImagesCell is a cell array containing 12 cells, consisting of a 65536x1 numeric matrix each. And you want to concatenate all cells to one matrix.