Answered

Empty index from loop

Importing your data as a table (which should automatically import dates as datetime): meta = readtable('Incidents_and_Headcount...

Empty index from loop

Importing your data as a table (which should automatically import dates as datetime): meta = readtable('Incidents_and_Headcount...

5 dagen ago | 1

| accepted

Answered

Sum up daily values to monthly values in a table of different company identifiers

It's trivial to do any number of ways. But first, your date must be stored as a proper datetime. If it's stored as you show: yo...

Sum up daily values to monthly values in a table of different company identifiers

It's trivial to do any number of ways. But first, your date must be stored as a proper datetime. If it's stored as you show: yo...

8 dagen ago | 1

| accepted

Answered

Difference between blockproc() and for loop method of splitting an image with overlap?

Hum, a for loop just iterates over whatever you want and execute whichever code you want. You can write a for loop that does exa...

Difference between blockproc() and for loop method of splitting an image with overlap?

Hum, a for loop just iterates over whatever you want and execute whichever code you want. You can write a for loop that does exa...

8 dagen ago | 0

Answered

you are designing a rectangular page to contain 60 inch^2 of printing with a 4-inch marging at the top bottom and a 2-inch margin at each side.what overall dimensions will minimize the amount of paper used?

While this is valid matlab: 1 == (60/(b-4)) + 8; it doesn't do much. Without the semicolon at the end, it would just display w...

you are designing a rectangular page to contain 60 inch^2 of printing with a 4-inch marging at the top bottom and a 2-inch margin at each side.what overall dimensions will minimize the amount of paper used?

While this is valid matlab: 1 == (60/(b-4)) + 8; it doesn't do much. Without the semicolon at the end, it would just display w...

8 dagen ago | 0

Answered

Fibonacci sequence up to first 256 elements

See Loren's blog for an efficient way to compute the fibonacci sequence using filter. As for your question, % Calculating firs...

Fibonacci sequence up to first 256 elements

See Loren's blog for an efficient way to compute the fibonacci sequence using filter. As for your question, % Calculating firs...

8 dagen ago | 0

Answered

How to use map and reduce efficiently?

Assuming your shares variable is numeric and assuming your grouping variables are {'rdate', 'cusip'}, t = tall(ds); [group, r...

How to use map and reduce efficiently?

Assuming your shares variable is numeric and assuming your grouping variables are {'rdate', 'cusip'}, t = tall(ds); [group, r...

9 dagen ago | 2

| accepted

Answered

Creating a Matrix from Distances between Vectors

This can be achieved easily without a loop: %demo data m = 46 n = 100 A = rand(3,m) B = rand(3,n) distance = sqrt(sum((p...

Creating a Matrix from Distances between Vectors

This can be achieved easily without a loop: %demo data m = 46 n = 100 A = rand(3,m) B = rand(3,n) distance = sqrt(sum((p...

10 dagen ago | 0

| accepted

Answered

Group maths on for loop

The vectorised version of what you intended with your loop (but didn't achieve): R=15; r=5; epsilon=100; delta=(R-r)*(epsilo...

Group maths on for loop

The vectorised version of what you intended with your loop (but didn't achieve): R=15; r=5; epsilon=100; delta=(R-r)*(epsilo...

10 dagen ago | 0

Answered

Save Function does not work

If you look at the error message #031 in the hdf save, you can clearly see the problem: #031: H5FDsec2.c line 822 in H5FD_sec...

Save Function does not work

If you look at the error message #031 in the hdf save, you can clearly see the problem: #031: H5FDsec2.c line 822 in H5FD_sec...

10 dagen ago | 1

Answered

How can I convert table of chars to array of strings?

I imported the data from an excel sheet as categorical array. It was somewhat manual to work to create my table Yes, you made a...

How can I convert table of chars to array of strings?

I imported the data from an excel sheet as categorical array. It was somewhat manual to work to create my table Yes, you made a...

10 dagen ago | 0

| accepted

Answered

arrayfun isreal fails - how to fix?

Note that the problem you highlight has nothing to do with isreal. I guess that you've uncovered an unexpected implementation de...

arrayfun isreal fails - how to fix?

Note that the problem you highlight has nothing to do with isreal. I guess that you've uncovered an unexpected implementation de...

10 dagen ago | 2

Answered

Some confusion in my script for lsqcurvefit

You know that (the badly named) P and L are both column vectors, then you have A=P; %how about using meaningful names fo...

Some confusion in my script for lsqcurvefit

You know that (the badly named) P and L are both column vectors, then you have A=P; %how about using meaningful names fo...

10 dagen ago | 1

| accepted

Answered

How to specify the type of the argument of the function?

If you're asking how to construct a BlockInfo object, with the current class definition, it has to be: block = BlockInfo; bloc...

How to specify the type of the argument of the function?

If you're asking how to construct a BlockInfo object, with the current class definition, it has to be: block = BlockInfo; bloc...

10 dagen ago | 0

Answered

Can this be written in a much better way for fast computations?

If Joel hypothesis that "You want to look at each pixel which is mostly water, and assign a distance from the pixel to all surr...

Can this be written in a much better way for fast computations?

If Joel hypothesis that "You want to look at each pixel which is mostly water, and assign a distance from the pixel to all surr...

10 dagen ago | 3

Answered

[Help] writetable text alignment and saving pre 0

Your question is not very clear. I'm not sure what you're referencing with it. Note that the numbers 0409, 0000000000409, 409.0...

[Help] writetable text alignment and saving pre 0

Your question is not very clear. I'm not sure what you're referencing with it. Note that the numbers 0409, 0000000000409, 409.0...

10 dagen ago | 1

| accepted

Answered

Error: Index in position 1 exceeds array bounds.

You've told xlsread to import from row 607 to 1947, therefore, you'll get a (1947-607+1 = 1341) x 2 array, where row 1 correspon...

Error: Index in position 1 exceeds array bounds.

You've told xlsread to import from row 607 to 1947, therefore, you'll get a (1947-607+1 = 1341) x 2 array, where row 1 correspon...

11 dagen ago | 0

Answered

How to find out the image name of a randomly selected image and save it to workspace by PushButton?

The code you show doesn't appear to be related to a GUI, so it's unclear how it relates to your question. how does the image na...

How to find out the image name of a randomly selected image and save it to workspace by PushButton?

The code you show doesn't appear to be related to a GUI, so it's unclear how it relates to your question. how does the image na...

11 dagen ago | 0

| accepted

Answered

How can I find all object of a certain handle class?

I don't think there's any way to track down instances after the fact. You could however track the creation and deletion of all...

How can I find all object of a certain handle class?

I don't think there's any way to track down instances after the fact. You could however track the creation and deletion of all...

12 dagen ago | 4

| accepted

Answered

Meshgrid function different order

Personally, I think meshgrid is an abomination as it doesn't really makes its mind what order the dimensions are in. It iterates...

Meshgrid function different order

Personally, I think meshgrid is an abomination as it doesn't really makes its mind what order the dimensions are in. It iterates...

12 dagen ago | 1

Answered

How to assign points to multiple polygons using inpolygon

There is no point iterating over each point and each polygon. You can pass all the points at once to inpolygon. Here's how I'd i...

How to assign points to multiple polygons using inpolygon

There is no point iterating over each point and each polygon. You can pass all the points at once to inpolygon. Here's how I'd i...

12 dagen ago | 1

| accepted

Answered

How to display images in APP DESIGNER?

If you want to display your image in a uiimage control, then simply assign the image to the ImageSource property of the control:...

How to display images in APP DESIGNER?

If you want to display your image in a uiimage control, then simply assign the image to the ImageSource property of the control:...

13 dagen ago | 0

| accepted

Answered

Tall array - How can I perform conditional search and extract information

It should be as simple as: highestprice = gather(groupsummary(tt, [1, 2], {'none', 'day'}, 'max', 5)) %you can replace 1, 2, a...

Tall array - How can I perform conditional search and extract information

It should be as simple as: highestprice = gather(groupsummary(tt, [1, 2], {'none', 'day'}, 'max', 5)) %you can replace 1, 2, a...

13 dagen ago | 0

| accepted

Answered

help with basic 2048 game function

I'll be editing this answer as I read the code. ---edit: the main reason for your code not working is at the end of the answer....

help with basic 2048 game function

I'll be editing this answer as I read the code. ---edit: the main reason for your code not working is at the end of the answer....

15 dagen ago | 1

| accepted

Answered

Attempting to find patterns within my data

%demo data: A = logical([ 0 1 0 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1]) Finding the start index (in the first column) of ...

Attempting to find patterns within my data

%demo data: A = logical([ 0 1 0 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1]) Finding the start index (in the first column) of ...

15 dagen ago | 0

Answered

Save data from for loop without subscript index

%... constant definitions timesteps = t0:dt:t_stop; h = zeros(size(timesteps)); %preallocate h for step = 1:numel(timestep...

Save data from for loop without subscript index

%... constant definitions timesteps = t0:dt:t_stop; h = zeros(size(timesteps)); %preallocate h for step = 1:numel(timestep...

15 dagen ago | 0

| accepted

Answered

Unable to read the last line by using regexp

As I said, your regular expression is invalid, and even corrected doesn't work very well. I also suspect that the (\r) was meant...

Unable to read the last line by using regexp

As I said, your regular expression is invalid, and even corrected doesn't work very well. I also suspect that the (\r) was meant...

16 dagen ago | 1

| accepted

Answered

How can I get the indices of values meeting a condition in a tall array?

Maybe find is not working on tall since I use 2017b Indeed, support for using find on tall arrays was added in R2018a. As for...

How can I get the indices of values meeting a condition in a tall array?

Maybe find is not working on tall since I use 2017b Indeed, support for using find on tall arrays was added in R2018a. As for...

16 dagen ago | 0

Answered

A doubt regarding a simple For loop indexing for certain rows only.

Since nobody has explained why your code doesn't work: There are several problems with your if a(c, [1:4]) == [1, 2, 3, 4] | [...

A doubt regarding a simple For loop indexing for certain rows only.

Since nobody has explained why your code doesn't work: There are several problems with your if a(c, [1:4]) == [1, 2, 3, 4] | [...

16 dagen ago | 1

| accepted

Answered

How to solve "Subscripted assignment dimension mismatch"?

Off by one error, 279:322 is 44 elements not 43. Same for all the other indices, you've got one more element than required. Any...

How to solve "Subscripted assignment dimension mismatch"?

Off by one error, 279:322 is 44 elements not 43. Same for all the other indices, you've got one more element than required. Any...

16 dagen ago | 0

| accepted

Answered

Out of memory. The likely cause is an infinite recursion within the program.

You, or some code you've downloaded is shadowing the isrow.m function of matlab. Hopefully, the isrow.m you've deleted is not t...

Out of memory. The likely cause is an infinite recursion within the program.

You, or some code you've downloaded is shadowing the isrow.m function of matlab. Hopefully, the isrow.m you've deleted is not t...

16 dagen ago | 1