Answered

Invalidate user entry by using isnan or isempty function

str2double returns NaN (not-a-number) when it cannot convert text to a number. You can therefore simply use isnan to test if a n...

Invalidate user entry by using isnan or isempty function

str2double returns NaN (not-a-number) when it cannot convert text to a number. You can therefore simply use isnan to test if a n...

3 years ago | 0

Answered

Combinations of array rows with exclusion

This answer does not have any of the duplicates that are present in my previous answer: A = [20 10;20 15;20 30;22 15;25 10; 30 ...

Combinations of array rows with exclusion

This answer does not have any of the duplicates that are present in my previous answer: A = [20 10;20 15;20 30;22 15;25 10; 30 ...

3 years ago | 0

| accepted

Answered

Combinations of array rows with exclusion

OK, so how about this? A = [20 10;20 15;20 30;22 15;25 10; 30 10]; cellArr{1} = deleteOneRow(A); for i = 2:size(A,1)-4 ...

Combinations of array rows with exclusion

OK, so how about this? A = [20 10;20 15;20 30;22 15;25 10; 30 10]; cellArr{1} = deleteOneRow(A); for i = 2:size(A,1)-4 ...

3 years ago | 1

Answered

Code for action when ui toggle button is pressed

Yes, that's indeed the problem - the selected button never changes because you only have one button in the button group, so the ...

Code for action when ui toggle button is pressed

Yes, that's indeed the problem - the selected button never changes because you only have one button in the button group, so the ...

3 years ago | 1

| accepted

Answered

error on using fplot

Your solution usol contains two symbolic variables, x and d, but fplot can only deal with functions of a single variable. I supp...

error on using fplot

Your solution usol contains two symbolic variables, x and d, but fplot can only deal with functions of a single variable. I supp...

3 years ago | 0

| accepted

Answered

Display same image with different rotations

I assume you are talking about 2D images: % prepare an image but hide it initially (for better timing) h = imagesc(peaks, 'Vis...

Display same image with different rotations

I assume you are talking about 2D images: % prepare an image but hide it initially (for better timing) h = imagesc(peaks, 'Vis...

3 years ago | 0

Answered

Combining Two plots with different with the same y axis and different x axis length

If the widths of your two plot boxes have an integer ratio (such as 4:1), you can use tiledlayout to do this. First create one r...

Combining Two plots with different with the same y axis and different x axis length

If the widths of your two plot boxes have an integer ratio (such as 4:1), you can use tiledlayout to do this. First create one r...

3 years ago | 0

Answered

How do I write a code to rearrage the colors in an RGB color array?

The third dimension of your 229x600 image contains the rgb values for each pixel: image1(:,:,1) is the red channel, image1(:,:,2...

How do I write a code to rearrage the colors in an RGB color array?

The third dimension of your 229x600 image contains the rgb values for each pixel: image1(:,:,1) is the red channel, image1(:,:,2...

3 years ago | 1

| accepted

Answered

Finding the sum of the first n primes and to use a while function

There are two issues in your code: You are testing if i is not a prime number, when you actually want to test whether it is a p...

Finding the sum of the first n primes and to use a while function

There are two issues in your code: You are testing if i is not a prime number, when you actually want to test whether it is a p...

3 years ago | 0

Answered

MATLAB Figure and LATEX

I'm not sure what the issue is, but your figure displays just fine when I save it to a png file (my preferred graphics file form...

MATLAB Figure and LATEX

I'm not sure what the issue is, but your figure displays just fine when I save it to a png file (my preferred graphics file form...

3 years ago | 0

Answered

Merging two arrays of two different types

You are combining double values (from a) with character values (from b), which yields a character array according to MATLAB's cl...

Merging two arrays of two different types

You are combining double values (from a) with character values (from b), which yields a character array according to MATLAB's cl...

3 years ago | 1

| accepted

Answered

How Can I Show a txt File in a GUI ?

A text area would be the way to go, as it will show a scroll bar and wrap text if the content of the textfile is larger than the...

How Can I Show a txt File in a GUI ?

A text area would be the way to go, as it will show a scroll bar and wrap text if the content of the textfile is larger than the...

3 years ago | 0

| accepted

Answered

Count if a vector has at list one element greater than zero

count = sum(v>0) The expression v>0 creates a logical array of 1s and 0s, with a 1 for every element of v that is greater than ...

Count if a vector has at list one element greater than zero

count = sum(v>0) The expression v>0 creates a logical array of 1s and 0s, with a 1 for every element of v that is greater than ...

3 years ago | 0

| accepted

Answered

Equation in a single column matrix?

When I run your code (after fixing a typo when you refer to what I think should be b(n)/13), the result is a 1-by-6 array for c:...

Equation in a single column matrix?

When I run your code (after fixing a typo when you refer to what I think should be b(n)/13), the result is a 1-by-6 array for c:...

3 years ago | 1

| accepted

Answered

evaluation of anonymous function

I am not quite sure if this is what you are asking, but I'll give it a shot: The piece of code important to your question is r...

evaluation of anonymous function

I am not quite sure if this is what you are asking, but I'll give it a shot: The piece of code important to your question is r...

3 years ago | 1

Answered

Adding a pathdef.m file, as a string, to the current path

You probably want to use textscan for this: fileID = fopen('pathdef_etc.m') C = textscan(fileID, '%s', 'Delimiter', '\n') fcl...

Adding a pathdef.m file, as a string, to the current path

You probably want to use textscan for this: fileID = fopen('pathdef_etc.m') C = textscan(fileID, '%s', 'Delimiter', '\n') fcl...

3 years ago | 1

| accepted

Answered

how to define a gradient colormap

Yes, you can use a fixed colormap by executing the following command each time you plot an image: caxis([-1 1]) This will map ...

how to define a gradient colormap

Yes, you can use a fixed colormap by executing the following command each time you plot an image: caxis([-1 1]) This will map ...

3 years ago | 1

| accepted

Answered

Index a cell array with an cell

Hi Christian, You can pick the corresponding entries for each of the cells of C as follows: C{i}(B{i}==0) The results are the...

Index a cell array with an cell

Hi Christian, You can pick the corresponding entries for each of the cells of C as follows: C{i}(B{i}==0) The results are the...

3 years ago | 0

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

3 years ago

Answered

Delete values in a table but keep the cells

Try df{r,c} = {''} instead. You should be able to avoid the inner loop entirely by using df{r,3:nCols} = {''} Also, to check...

Delete values in a table but keep the cells

Try df{r,c} = {''} instead. You should be able to avoid the inner loop entirely by using df{r,3:nCols} = {''} Also, to check...

3 years ago | 0

| accepted

Answered

Specify annotation position with respect to x- and y-axes values?

This is an older post, but the following is perhaps useful to others: If horizontal arrows are ok, data units can be used by as...

Specify annotation position with respect to x- and y-axes values?

This is an older post, but the following is perhaps useful to others: If horizontal arrows are ok, data units can be used by as...

3 years ago | 21

Answered

check if figure exists whithout making it appear and using its figure number in findobj()

R2014b and later no longer use numeric handles for graphics objects, so most answers given above do not work. In these cases, ...

check if figure exists whithout making it appear and using its figure number in findobj()

R2014b and later no longer use numeric handles for graphics objects, so most answers given above do not work. In these cases, ...

8 years ago | 1