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**Content Feed**

Question

How to specify the color of this contourf plot?

I'm trying to plot the landmask (logical 0 or 1) using a uniform color. Below is my code: % Turning the landmask from logical t...

17 dagen ago | 1 answer | 0

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answerQuestion

How to create a land/sea mask based on an XYZ bathymetry database?

I have a gridded global bathymetric database with X, Y, and E. X is longitude, Y is latitude, and E is the elevation. E can be p...

21 dagen ago | 1 answer | 0

### 1

answerQuestion

Export a plot with predefined margins

I'm using the below command to export my plot into a jpeg file: % h is the handle for the figure % File_W is my jpeg file name...

23 dagen ago | 1 answer | 0

### 1

answerQuestion

Creating depth specific contours from bathymetry data

The bathymetric data are available through NetCDF, Data GeoTiff and ESRI ASCII raster formats: https://www.gebco.net/data_and_pr...

27 dagen ago | 1 answer | 0

### 1

answerQuestion

Calculation using matrix indexing for elements with a certain thresholds

I need to calculate the percentage differences of all elements that are larger than 5 in two matrices (A and B). Both A and B ha...

ongeveer een maand ago | 1 answer | 0

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answerQuestion

Matlab parfor transparency violation error.

It is my first time to use Matlab parfor, and I'm getting the transparency violation error as below: Error using A02_use (line ...

ongeveer 2 maanden ago | 0 answers | 0

### 0

answersHow to write a parallel computing script for this situation?

Many thanks for the input, John! To clarify, the function is not my code. It is a peer-reviewed one from someone else. Were ...

ongeveer 2 maanden ago | 0

Question

How to write a parallel computing script for this situation?

I have a program that has been running for more than a week. I have no idea how many additional days it will take. Would anyone ...

ongeveer 2 maanden ago | 1 answer | 0

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answerQuestion

How to read this kind of info out of a txt file and post them into Excel files?

I receive the below info from emails and would store them into an txt file named FmEmail.txt. The info is composed of several gr...

5 maanden ago | 1 answer | 0

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answerQuestion

Need help using contourfm in Map plotting

Normally, I can use contourf to plot a countour like this: [C1, h1] = contourf (X, Y, Z, [7.9:0.005:8.2], 'LineStyle', 'none' )...

5 maanden ago | 1 answer | 0

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answerQuestion

How to blank a grid value with a boundary file?

I have a grid like the below: [X, Y] = ndgrid([-180:0.25:179.75],[-90:0.25:89.75]); Z = griddata(...); %on the same grid as X ...

5 maanden ago | 1 answer | 0

### 1

answerQuestion

How to find the nearby sampling stations

I have millions of samping sations, my goal is to find the nearby stations with a certain distance threshold. What is the best w...

5 maanden ago | 1 answer | 0

### 1

answerQuestion

How to convert arc length to km?

My goal is to find a good function to calculate the distance for two points for millions of data points. I found the fucntion ll...

5 maanden ago | 1 answer | 0

### 1

answerQuestion

How to create a callback for radio buttons

I have a group of radio buttons with 3 choices (app.mode1, app.mode2, and app.mode3) in app-designer. When a user clicks one of ...

6 maanden ago | 1 answer | 0

### 1

answerQuestion

How to change the button names depending on different situations?

I'm referring to buttons within app-designer. For example, I would want the button to be called "load" in one situation, and "p...

6 maanden ago | 1 answer | 0

### 1

answerMatlab textArea automatic new line issue

It turns out that the issue are the square brackets. Once I replace them with strcat, everything works perfectly now. Before: ...

6 maanden ago | 1

| accepted

Question

Limits of app-designer spinner input field

I have an app-designer spinner input field called app.A. I can set its limits by below: app.A.Limits = [1, max(cruiseList)]; H...

6 maanden ago | 1 answer | 0

### 1

answerQuestion

How to find the index of a column data whose values are equal to another column data?

For example: A = [31; 2; 57; 36; 87; 36]; B = [2; 36]; My goal is to find the inex of all the column A that are equal to any ...

6 maanden ago | 1 answer | 0

### 1

answerQuestion

Matlab textArea automatic new line issue

I'm trying to generate a list of items. For each research cruise, its Year, Month, Day, Longitude, Latitude, etc. should all be ...

6 maanden ago | 2 answers | 0

### 2

answersQuestion

How to establish the handle value of a personalized plot function?

I need to develop a program that will: (a) plot one set of data into a figure at a time, (b) when the next set of data is plot...

6 maanden ago | 1 answer | 0

### 1

answerQuestion

How to write this line of code to create a Matlab table?

I have unknown number of column variables in cell array: Var{1} = [ 1; 2; 3; 4; 7]; Var{2} = [33; 10; 46; 7; 2]; ... If I kn...

10 maanden ago | 1 answer | 0

### 1

answerQuestion

Anyone has issues with the Mathworks Community forum system?

I mean the system I'm using to ask this question. A lot of the time it would freeze for no reason and become uneditable. I wou...

10 maanden ago | 0 answers | 0

### 0

answersQuestion

Is it possible to have a column data with some numerical values and some strings?

I have some really large data with millions of rows. I would have a column with 95% of them being numerical and 5% being strings...

10 maanden ago | 1 answer | 0

### 1

answerQuestion

How to read out the strings from this Excel file?

Attached is the Excel file. Here is the code I use to read values out of the Excel file: T1 = readtable ('test.xlsx'); Unfo...

10 maanden ago | 1 answer | 0

### 1

answerQuestion

How to first form a variable and then assign values to it?

My variable can be anything like the below: if case1 Var = Temperature elseif case2 Var = Pressure elseif case3 V...

11 maanden ago | 1 answer | 0

### 1

answerQuestion

How to position radio buttons into grid layouts in App Designer?

Is it possible to position each of the radio buttons in a radio button group into a grid layout? Many thanks.

11 maanden ago | 1 answer | 1

### 1

answerQuestion

How to form a structure array variable?

I have a structure array like the below Test{1}.a = [1; 2; 3]; Test{1}.b = [7; 3; 22]; Test{1}.c = [4; 9; 22]; ... If I hav...

11 maanden ago | 2 answers | 0

### 2

answersQuestion

Is there such a table units identification approach?

Imagine I have a table T1. We know its units will be Units = T1.Properties.VariableUnits; Similarly, its header will be Heade...

11 maanden ago | 2 answers | 0

### 2

answersQuestion

How to replace -999 values with NaN in a Matlab table?

I have a Matlab table T1, with columns like the below: T1.year T1.month T1.day T1.var1 T1.var2 ... Some of its columns a...

11 maanden ago | 2 answers | 0

### 2

answersQuestion

How to bold a phrase in a textbox?

Below is my code. How do I bold the phrase "Flag: "? C = [C, newline, ['Flag: ', num2str(B(i)) ] ]; app.text1.Value = C;...

12 maanden ago | 1 answer | 0