Leon

Last seen: environ 2 mois il y a | Actif depuis 2019

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New empty figure window shows up every time I run this colormap command
I have a program created using App-Designer. After adding the code below to my script, it would generate a new empty figure, ev...

environ 2 mois il y a | 1 réponse | 0

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Question

How to disable interactive icons on Matlab plots within App Designer?
Every time after a Matlab plot is created, if you hover your mouse cursor to the upper right side of it, you will see small icon...

2 mois il y a | 1 réponse | 0

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Question

My program developed in App Designer is not fully functional in Runtime
Does anyone know why my program developed in App Designer is not working properly within Runtime? Is that because I have some co...

3 mois il y a | 1 réponse | 0

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Question

In App Designer, how can I ensure that the values displayed on the UI do not appear in scientific notation?
For example, I have a field called app.Profile.Value. Large numbers are often converted to scientific notation. How do I force a...

4 mois il y a | 1 réponse | 0

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Question

Can not read MAT file in another language
I have two MAT files. I can open A but can not open B in Julia. When I used the command “@show(File)”. I got the below for File...

4 mois il y a | 1 réponse | 0

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Question

Precision lost when combining Int32 integers with single precision numerical numbers
I have a column data A composed of Int32 numbers, and another column data B composed of single precision numbers. When I try t...

4 mois il y a | 4 réponses | 0

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Question

How to ensure the file path information in Matlab uialert windows is not abbreviated?
Below is my code: File_W = fullfile(Path, 'Output', ['Test_.xlsx']); message = sprintf(['An Excel file named ', File_W, ' has ...

4 mois il y a | 1 réponse | 0

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Question

A question about text string concatenation
Below is my code to concatenate several text strings together. Why doesn't it work? When I used disp(a), it shows them as separa...

4 mois il y a | 3 réponses | 0

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réponses

Question

Error: Inputs must be character vectors, cell arrays of character vectors, or string arrays.
Here is an example of my Variable A: A= "33RO30160505" "33RO30160507" "33RO30160508" isstring(A) = 1. However, I keep ge...

4 mois il y a | 1 réponse | 0

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Question

How to store this type of data with unknown number of them?
I have a N by 3 column data, each row, I need to store some additional information like the below: empty [] [1, 2, 31] [45] ...

5 mois il y a | 1 réponse | 0

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Question

How to convert a column of float or not data into double?
My data column can be float numbers throughout, e.g. A = [1, 2, 3]; or a strings, like the below B = [1, 2, 3, 'n/a', 5]; I...

5 mois il y a | 3 réponses | 0

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Question

How to reduce the file size of MAT files?
My MAT file is around 7 GB. It has been very slow to read and write into this file. I wonder if there are ways I can make the fi...

5 mois il y a | 2 réponses | 0

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Question

Is it possible to reduce this for loop into one line of code?
My goal is to simplify the for-loop below to a one line of code. Please see attached for a mat file storing the Headers variable...

8 mois il y a | 4 réponses | 0

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Question

How to simplify this for-loop into a one line of code?
Attached is a file storing a cell array A, a logical array for the columns: tf, and a logical array for A: map2. My goal is to...

8 mois il y a | 1 réponse | 0

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Réponse apportée
How to identify strings that can be converted to float numbers in a cell array?
Can it be as simple as this? >> str2double(A) ans = NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN ...

8 mois il y a | 0

Réponse apportée
How to identify strings that can be converted to float numbers in a cell array?
Many thanks for the proposed solution. Unfortunately, I have hundreds of these files, and each of them is like a box of chocol...

8 mois il y a | 0

Question

How to identify strings that can be converted to float numbers in a cell array?
I can convert a string to double using str2double, but my goal is to identify such cells. Attached is an example file. A = rea...

8 mois il y a | 2 réponses | 0

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réponses

Question

Cell2table issues when a numerical column is read as strings
Attached is a data file test5.mat, containing a varaible "A". It stores one column (out of many columns, which can either be num...

8 mois il y a | 1 réponse | 0

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Question

How to assign a double value to a cell array?
My goal is to replace any missing values in my cell array T1 with -999, if the column is composed of floating numbers, and repla...

8 mois il y a | 1 réponse | 0

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Question

Is this a bug of the detectImportOptions function?
My goal is to determine the location of the variable names row. Attached is a sample Excel data file. Metadata information cou...

8 mois il y a | 1 réponse | 0

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Question

Matlab Central bugs?
While I was trying to post a question on my Safari, several fields, including the "Description" was grayed out. As a result, I c...

8 mois il y a | 1 réponse | 0

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Question

How to read all rows of an Excel with missing rows included?
My goal is to read all contents of an Excel file as cells using the function "readcell". However, every time when I used this fu...

8 mois il y a | 4 réponses | 0

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réponses

Question

How to detect missing values in a string cell array
I have a cell array A like the below: Columns 1 through 4 {'NAME'} {'STNNBR'} {[<missing>]} {'SAMPNO'} . I tri...

8 mois il y a | 1 réponse | 0

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Question

Indexing data on a grid
I have a variable VAR with a size of 360 x 180. I also have an index Ind (composed of 1 and 0) on the same size. How do I get a ...

presque 2 ans il y a | 1 réponse | 0

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Question

How do I do a regress like this?
I have a series of numbers that decrease by about the same percetentage rate with time. How do I do the regression to find the e...

environ 2 ans il y a | 2 réponses | 0

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Question

Anyone knows how to make a vertical contour plot like this?
Attached is an example. The figure is from this paper: https://science.sciencemag.org/content/363/6432/1193. I wonder if this c...

presque 5 ans il y a | 1 réponse | 0

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A soumis

Reading information of a NetCDF file
"ncdisp" does not indicate the N number of a variable. Here is an alternative function. Var = netcdf.getVar(ncid, N);

presque 5 ans il y a | 1 téléchargement |

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Question

How to make a text area in app-designer GUI copyable?
I create a GUI interface using Matlab app-designer. One thing I notice is that the info generated inside a text area box can not...

presque 5 ans il y a | 1 réponse | 0

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Question

How to write a loop so that I do not need to repeat my super long inner loop?
The station number column of my data can be either numerical or string. I have to rely on the station number info to split the d...

plus de 5 ans il y a | 1 réponse | 0

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Question

How to figure out the number of rows for headers?
I have Excel files with unknown number of headers. For exmple, some files only have one row of header info. Another one could ha...

plus de 5 ans il y a | 2 réponses | 0

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