Leon

Last seen: 2 months ago | Active since 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...

2 months ago | 1 answer | 0

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answer

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 months ago | 1 answer | 0

1

answer

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 months ago | 0 answers | 0

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answers

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 months ago | 1 answer | 0

1

answer

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 months ago | 1 answer | 0

1

answer

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 months ago | 4 answers | 0

4

answers

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 months ago | 0 answers | 0

0

answers

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 months ago | 3 answers | 0

3

answers

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 months ago | 1 answer | 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 months ago | 1 answer | 0

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answer

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 months ago | 3 answers | 0

3

answers

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 months ago | 2 answers | 0

2

answers

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 months ago | 4 answers | 0

4

answers

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 months ago | 1 answer | 0

1

answer

Answered
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 months ago | 0

Answered
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 months ago | 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 months ago | 2 answers | 0

2

answers

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 months ago | 1 answer | 0

1

answer

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 months ago | 1 answer | 0

1

answer

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 months ago | 1 answer | 0

1

answer

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 months ago | 0 answers | 0

0

answers

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 months ago | 4 answers | 0

4

answers

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 months ago | 1 answer | 0

1

answer

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 ...

2 years ago | 1 answer | 0

1

answer

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...

2 years ago | 2 answers | 0

2

answers

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...

5 years ago | 0 answers | 0

0

answers

Submitted

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);

5 years ago | 1 download |

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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...

5 years ago | 0 answers | 0

0

answers

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...

5 years ago | 1 answer | 0

1

answer

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...

5 years ago | 2 answers | 0

2

answers