# Srh Fwl

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Question

How can I access the value of a string variable? I need to construct a file path from a string variable, but keep getting the variable name and not the string.

I want to construct a file path, "f" that I will use many times in a Matlab m file. From advice in an answer to someone else's ...

6 months ago | 2 answers | 0

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answersQuestion

How to add a cumulative constant to all values on each row of a matrix, starting from the bottom row and ending at the top row?

I have a matrix that is very large. A small example is: 1 2 3 1 2 3 1 2 3 I need to add a constant to each row, star...

7 months ago | 2 answers | 0

### 2

answersQuestion

I have two tables. How can I compare the values in the first column of each table, then do a calculation if the values are equal?

I imported data from two separate files. The data are stored in two separate tables. Each table contains columns of data. The...

9 months ago | 1 answer | 0

### 1

answerQuestion

Contour plot: distorted contours and blank spaces in plots.

I would be grateful if someone would please help me understand how to use "contour." The plot below shows what I have so far...

1 year ago | 2 answers | 0

### 2

answersQuestion

Fill area inside a single curve with color without an outline?

https://uk.mathworks.com/matlabcentral/answers/522591-fill-inside-a-polygon-with-a-color The data below form an almost-closed c...

2 years ago | 1 answer | 0

### 1

answerQuestion

Interpolation based on three arrays. Problem: entering values for two parameters to get a third gives me the nearest input data values (no interpolation).

I have measured temperature, pressure, and volume of something and now have a file where there are three columns: T, P, and V. ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Is it possible to use Matlab to get expressions for the coefficients in polynomial regression? (I.e., not just constant coefficients)

I'm trying to modify one section of an old code so that it uses my new data for one of its parameters. The code expresses an eq...

2 years ago | 2 answers | 0

### 2

answersQuestion

How can I fill in the area between two curves? The curves are not the same length and also don't form a closed shape.

The plot at the top is an example of what I have. There are two data series. The top series (filled squares) represe...

2 years ago | 1 answer | 0

### 1

answerQuestion

How can I identify only the first or first two local minima from "islocalmin" and then display it in a table on a plot?

I have plots that look like the example below. There are several curves that look like horizontal waves. For each one, there i...

3 years ago | 1 answer | 0

### 1

answerQuestion

Plot design resources?

I'm not sure if this is an appropriate question for the forum. If it isn't, please let me know. I routinely make Matlab line...

3 years ago | 1 answer | 0

### 1

answerQuestion

How can I find the Y value on an X–Y plot that corresponds to the tangent of the flattest part of a curve?

I have plots like the one attached. At Y >0, the curve plateaus (flattens) before it increases sharply. I need to find the ...

3 years ago | 2 answers | 0

### 2

answersQuestion

Is there a simple way to omit legend entries?

I have plotted figures where there are numerous diagonal reference lines. I only need one line to appear in the legend. Howe...

3 years ago | 1 answer | 0

### 1

answerHow can I plot a reference line of slope 1 on a loglog plot?

Figured it out. xref = 10.^(-1:.1:3); yref = xref plot(xref,yref)

3 years ago | 0

| accepted

Question

How can I plot a reference line of slope 1 on a loglog plot?

I am not an experienced Matlab user and would appreciate advice on adding diagonal reference lines to loglog plots. I.e., the l...

3 years ago | 1 answer | 0

### 1

answerQuestion

Problem plotting 1D array versus table column: I want a single curve/series but am instead getting a separate series for every array element.

I have used Matlab's "Import Data" facility to import a single column of data from a file. I can plot it by doing this: plot(m...

3 years ago | 1 answer | 0

### 1

answerQuestion

Is it possible to manipulate a plot axis; i.e., divide values by 1000 so that the x axis range is 0 to 300 instead of 0 to 300000 and also get rid of exponential notation?

I am making X–Y plots of results from very long simulations. Right now, my plots are unsightly because: The X axis goes from 1...

4 years ago | 2 answers | 0

### 2

answersQuestion

Grid a plot with diagonal lines

I would like to plot a diagonal grid where there are three or four lines of positive slope=1 like in the figure attached. I don...

4 years ago | 2 answers | 0

### 2

answersQuestion

In a matrix column/array, how can I turn all numbers higher than a certain value into nans?

I have a 1 D array (column) of measured data (that I ultimately append to a matrix). I want to plot the data. There are numb...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to take an average of row elements in a two-column matrix when both elements do not contain a NaN, but use only the non-NaN value when there is a NaN?

I have a matrix with two columns of data. The data are measurements collected at the same times from different sensors, TT1 and...

4 years ago | 1 answer | 0

### 1

answerQuestion

How can I concatenate a "datetime" column to a matrix of numbers?

I have imported a table from an external file via textscan. For example: A = rawCellColumns2(:, 1); B = cell2ma...

4 years ago | 1 answer | 0

### 1

answerQuestion

For elements in two arrays/columns of numbers, how can I find the average only if both elements are non-zero?

I have many external files. Each file contains two long columns of numbers, like this: 1 2 11 12 6 48 9...

4 years ago | 1 answer | 0