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Pizza!

Given a circular pizza with radius z and thickness a, return the pizza's volume. [ z is first input argument.] Non-scored bonus...

17 dagar ago

Question

How to count the number of non-nan values for combination of multiple variables

Hello, I would like to count the number of non-nan values in the d column for unique combinations of a, b and c (i.e I want to g...

ungefär 2 månader ago | 2 answers | 0

### 2

answersQuestion

How to do a cross-multiplication by group in a table

Hi. I am wondering how to do a cross-multiplication (rule of three) by group in a table. More specifically I have an initial tab...

3 månader ago | 1 answer | 0

### 1

answerQuestion

Difficulty using the database function

Hi. I have Matlab 2021b and Matlab 2024a installed and with Matlab 2021b I can easily connect to a database via an ODBC bridge j...

4 månader ago | 1 answer | 0

### 1

answerQuestion

How to remove trailling numbers when using the update function (database toolbox)

Hi, Im using the update function from the database toolboox to update data in an Oracle database conn = database(env, user, pa...

11 månader ago | 1 answer | 0

### 1

answerQuestion

Merging cells problem with actxserver

I have an issue with using actxserver to merge cells in Excel. In the script below I expect to merge the cells B1:C1, D1:E1, F1:...

mer än ett år ago | 2 answers | 0

### 2

answersQuestion

In a report, how can you find out the height of table in pixels ?

I am printing multiple tables in a report but I dont know how long each table will be (and some tables are multiple pages long) ...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

How to save high resolution image of a webmap

I simply want to save a high resolutionof image of the following webmap. I know wmprint exist but it does a terrible job. web...

mer än ett år ago | 0 answers | 0

### 0

answersQuestion

How to find the closest point to a line

Hello, I am having a bit of a hard time finding which point (i.e centroid) is closest to a line formed by the start and end coo...

nästan 2 år ago | 2 answers | 0

### 2

answersQuestion

How to count the number of rows per group

Hi, I simply want to count the number of rows per group (for unique combinations of a, b and c). Groups where either a, b, or c ...

nästan 2 år ago | 1 answer | 0

### 1

answerIf-function in tables does not work

If I understand correctly, the cyclist has answered this question: https://www.mathworks.com/matlabcentral/answers/321819-how-to...

mer än 2 år ago | 0

Question

How to assign multiple categories based on the mean of multiple groups

Hi, I want to assign categories based on the mean variable of multiple groups in the table below. For each unique combination ...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

How to merge two variables together in a table

Hi, I have a quick question : I have an initial table T and I would like to merge the variables deph1 and deph2 into a single ne...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

How to get rid of an extra space added by getSnapshotImage

Hello, getSnapshotImage seems to be adding an extra space in the annotation of my figures. In the dummy plot below there is no ...

nästan 3 år ago | 1 answer | 0

### 1

answerHow do I get time in input?????

You mean like this ? You can enter time as '23:45' for example prompt = 'What time is it ? '; t = datetime(input(prompt), 'For...

nästan 3 år ago | 0

Question

How to modify the size of images in a report

Hello, I am struggling to add images of the correct size in a report (https://www.mathworks.com/matlabcentral/answers/1563981-h...

nästan 3 år ago | 1 answer | 0

### 1

answerQuestion

How to increase the size of figures in Report Generator

Hello, I want to have 2 figures per page in my report but I cant figure out how to maximize the size of my figures so that I am...

nästan 3 år ago | 0 answers | 0

### 0

answersQuestion

How to save a figure of a specific size with exportgraphics

Hello, I simply want to export a figure of a specific size (6 x 9 inches) with the function exportgraphics as described here (h...

nästan 3 år ago | 1 answer | 0

### 1

answerQuestion

How to conditionally merge multiple variables in a table

Hi, In the table t below I would like to merge the variables var_c, var_d and var_e into a single new variable called new_var. ...

ungefär 3 år ago | 1 answer | 0

### 1

answerQuestion

How to use sqlwrite

Hi, I am running into some problems with sqlwrite. I am trying to duplicate the example found here (https://www.mathworks.com/h...

ungefär 3 år ago | 1 answer | 0

### 1

answerQuestion

How to conditionally format a variable with fprintf

Hi, Quick question: a want to contionally format a variable so that there are 2 decimals for all numbers except for 0; 0 should...

ungefär 3 år ago | 1 answer | 0

### 1

answerWhat functions should be moved to basic MATLAB?

Hi Walter, Im tempted to say shaperead from the Mapping Toolbox. Yes, I know shaperead is a big part of the Mapping Toolbox but...

ungefär 3 år ago | 1

What’s wrong?

Is this what you want ? Works fine. t = 0:1/6000:1/30 v = (4*cos((120*pi*t) + (pi/3))) plot(t,v)

mer än 3 år ago | 0

Question

How to subsample a dataset per week

Hi, I would like to subsample a dataset in such a way as to keep only the data that was collected on the first sampled day of t...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

How to transform multiple sets of coordinates in a csv file into a single shapefile

Hi, I was wondering what was the easiest way to transform the coordinates of multiple polygons in a csv file into a single shap...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

How to conditionally merge rows in a table

Hi, I have a quick question - I have the following table T and I would like to merge the rows where the values of the variabl...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

How to replace leading zeroes by spaces with regexprep

Hi, I have a basic question. I simply need to replace the leading zeroes by empty spaces in table T except for the last zero wh...

ungefär 4 år ago | 3 answers | 0

### 3

answersQuestion

How to duplicate the number of rows in a table based on frequency

Hi, I have a frequency table like this where N is the number of occurences: id = [1004, 1004, 1004, 1004]'; length = [23, 45,...

ungefär 4 år ago | 1 answer | 0

### 1

answerQuestion

Fastest way to replace NaNs by empty cells in a table

Hi, I need to replace the NaNs in the columns a and b by empty cells. The code below works but it is pretty slow. Is there a fa...

ungefär 4 år ago | 1 answer | 0

### 1

answerQuestion

How to reformat a table

Hi, My problem is very straightforward: i need to transform T1 into T2. What is tricky about this (in my mind anyway) is that s...

mer än 4 år ago | 1 answer | 0