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Razvan Carbunescu

MathWorks

Last seen: etwa 4 Jahre vor |  Aktiv seit 2018

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Beantwortet
How can I count the occurrences of each element in a vector in MATLAB?
There is a simpler way of answering this now using groupcounts(R2019a) or grouptransform(R2018b): >> x=[10 25 4 10 9 4 4]'; ...

mehr als 5 Jahre vor | 6

Beantwortet
using acummarray to average several columns at a time?
There's a simpler way of doing this with groupsummary I imported the sampledata and made the table with 7 columns: Year,Month,...

fast 6 Jahre vor | 4

| akzeptiert

Beantwortet
Divide table in days and then in hours.
Depending on the final goal here could use some of the functionality within <https://www.mathworks.com/help/matlab/ref/groupsumm...

mehr als 6 Jahre vor | 1

Beantwortet
How to use accumaray to aggregate text/string based?
<https://www.mathworks.com/help/matlab/ref/accumarray.html accumarray> is for numerics only but if |c| is going to only be singl...

mehr als 6 Jahre vor | 0

Beantwortet
matrix multiplication speed calculation
Matrix multiplication (GEMM) is one of the heavily optimized methods and when operating on larger inputs more optimizations, blo...

mehr als 6 Jahre vor | 3

Beantwortet
Replacing NaN with the average of previous and next cell value
This sounds like a use for <https://www.mathworks.com/help/matlab/ref/fillmissing.html fillmissing> with linear option: >> ...

mehr als 6 Jahre vor | 1

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Beantwortet
How to find "maximum" value in a table
Can accomplish this easier with indexing >> T = readtable('test1.txt'); >> [~,maxidx] = max(T.SPmin); >> T(maxidx,:) ...

mehr als 6 Jahre vor | 2

| akzeptiert

Beantwortet
How to output specific rows from tables depending on values within the table?
If you're using R2018a and only interested in maximum JumpHeight can use <https://www.mathworks.com/help/matlab/ref/groupsummary...

mehr als 6 Jahre vor | 1

Beantwortet
Daily average precip for many years
An alternative if using R2018a is <https://www.mathworks.com/help/matlab/ref/groupsummary.html groupsummary>, it has a few diffe...

mehr als 6 Jahre vor | 1

Beantwortet
How to get cumulative sum in yearly buckets
If using R2018a and wanting the final sum each year only can use <https://www.mathworks.com/help/matlab/ref/groupsummary.html gr...

mehr als 6 Jahre vor | 0

Beantwortet
Subdivide group of data
If using R2018a you can compute the data easier by using <https://www.mathworks.com/help/matlab/ref/groupsummary.html groupsumma...

mehr als 6 Jahre vor | 0

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Beantwortet
Accumarray help: extracting matrix min/max based on values in first column.
For this case the type of the data is probably what is giving you the problem. In R2018a you can use <https://www.mathworks....

mehr als 6 Jahre vor | 1

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Beantwortet
smoothing data
The issue in your code is the fact that veldata has 1 less elements than posdata because of the diff command. If you add a 0 to ...

mehr als 6 Jahre vor | 0

Beantwortet
find duplicate values using accumarray() function:
Using <https://www.mathworks.com/help/matlab/ref/accumarray.html accumarray> specifically you could do this by combining with <h...

mehr als 6 Jahre vor | 1

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Beantwortet
What am I doing wrong with the function 'topkrows'
topkrows was initially introduced in R2016b as a function for tall arrays and tables only. In R2017b the functionality was ad...

mehr als 6 Jahre vor | 0

Beantwortet
Data Analysis: Can I compare and match timestamps?
I think you are looking for something like <https://www.mathworks.com/help/matlab/ref/table.join.html join> or <https://www.math...

mehr als 6 Jahre vor | 0

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Beantwortet
find the number of elements in matrix
If using R2018a can use <https://www.mathworks.com/help/matlab/ref/groupsummary.html groupsummary> with the first syntax: G...

mehr als 6 Jahre vor | 0

Beantwortet
How to seperate the scattered population in three broad groups
In addition to the suggestion above, if you are looking for a way to automate the process of splitting the data could look at th...

mehr als 6 Jahre vor | 0

Beantwortet
ODE45 help varying values
The height of the answer is the number of timesteps needed to compute the solution. The a=1, b=2 solution takes more steps to ...

mehr als 6 Jahre vor | 0

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Beantwortet
how to convert hourly average into monthly??
If using R2018a and the data lives in a table T with variables 'Time' and 'Data' can accomplish this by using the new <https://w...

mehr als 6 Jahre vor | 0

Beantwortet
For loop mean values into matrix
You can use a <https://www.mathworks.com/help/matlab/ref/groupsummary.html groupsummary> command in R2018a but have to convert i...

mehr als 6 Jahre vor | 1

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Beantwortet
Get means for nested categorical variables
Can also use <https://www.mathworks.com/help/matlab/ref/groupsummary.html groupsummary> to compute directly one go from T: ...

mehr als 6 Jahre vor | 1