Community Profile # Martin

43 total contributions since 2013

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Question

Can this for-loop code get faster in some way?
I got a big result table named resTbl. There I need for each row to grab a timestamp (posix time) and construct a period interv...

5 months ago | 1 answer | 0

### 1

Question

is there an index maneuver if index is 0?
Hello, I am running a ismember: [logical idx] = ismember(hund(:,1),dogs(:,2)) ('hund' is often around 3,000 rows, and 'dogs' ...

5 months ago | 1 answer | 0

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Question

Add timetable with many months to another timetable with few months
I have two time tables like this: cars = 1×1 timetable Time Cars ________ ________ Sep-2019 ...

5 months ago | 1 answer | 1

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Question

sum of timetables for each months
I got 2 timetables buses and cars like below. Does anyone know how to achieve the last table which sum each months? buses = ...

6 months ago | 2 answers | 0

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Question

How to simplify this and make it efficient
I have a 1x500 cell (res) with a structure in each, and a 300x3 table (G). I need to check for each combination if strcmp betwee...

6 months ago | 1 answer | 0

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Question

Can this stacking code be simplified
Hello, I need to create a figure (f) and insert a table. It works well: f = figure('units','normalized'); pets = ta...

6 months ago | 0 answers | 0

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Question

Saving a table as PDF, - how can I rotate it 90 degrees
Hello, I want to save a big table() which has like 20 columns. Therefore it would be nice to rotate the PDF paper 90 degrees. ...

6 months ago | 1 answer | 0

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Question

Matlab rounding my values without me wanting it
Hello, this basically frustrates me a bit, - if I have: Price = 20074.5; And I present it in my table like this: disp(table(P...

6 months ago | 1 answer | 0

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Question

I need turnover for last month from my table
Hello, I have a table like the one below: summary = 6×2 table Time Monthly_Turnove...

6 months ago | 1 answer | 0

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Question

Monthly turnover where I need the sum
Hi, I have a x 2 table like this: Rows can vary from 1:inf. I need sum of the monthly Turnover (2. column) from timestamp (1...

7 months ago | 1 answer | 0

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Question

number to string and char to string in table
how to convert number to string and char to string in a table?

7 months ago | 1 answer | 0

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Question

Round down to a chosen hour-min-sec time at a date
Hello, I use now_time = datetime(now,'ConvertFrom','datenum') Assume it gives me ans = datetime 14-May-2019 02:28:24...

10 months ago | 2 answers | 0

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Question

conditional logic inside conditional logic
Hello, I would like to know if there is any way to write the following in one line ? if isfield(hund.A) if hund.A == 1 ...

1 year ago | 1 answer | 0

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Question

Date and time formate translation
I need to translate those dates and time (strings) '25-Mar-2014 13:00:00' '07-Nov-2018 18:30:45' to the forllowing format (i...

1 year ago | 1 answer | 0

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Frustrating datetime and datestr
thanks for answer. Let me say whats confusing me. If I use t = datetime('03-Nov-2018 00:00:00','InputFormat','dd-MMM-yyyy HH...

1 year ago | 0

Question

Frustrating datetime and datestr
Hey I got this hund = datetime(end_stamp, 'convertfrom','posixtime') % which give this: hund = datetime 05-Nov-...

1 year ago | 2 answers | 0

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Question

The code below works as it should, but its slooow. I have a data variable with x number of cells. I want every row in column 6 o...

1 year ago | 1 answer | 0

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Question

find dublicated value in a column and return the whole row
imagine I have this: A = [ 1 ; 3 ; 5 ; 6 ; 9 ] and B = [ 1 4 ; 2 7 ; 3 5 ; 9 10 ] I need to end up with: C = [ 1...

1 year ago | 1 answer | 0

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Question

add non zeros in array to my probability formular
Imagine I have probabilities in this array: a = [ 0.4 0 0 ; 0.6 0.5 0.8 ; 0 0.3 0.3 ]; then I want to add all non-...

1 year ago | 1 answer | 0

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Question

How to reverse a duration?
e.g. c = minutes(2) gives a duration variable: c = 2 min... How to reverse it and get just an integer of 2 ?

1 year ago | 2 answers | 0

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Question

Hello, I have like 4 Intel Matlab clients and 1 powerful AMD Matlab client (Ryzen 1950, overclocked). I need to do heavy calcul...

1 year ago | 1 answer | 1

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Question

Send alert mail if matlab/computer shuts down
As laid out in the title, what would a proper or easy way of doing this be? I have two computers, if A shuts down with main mat...

1 year ago | 1 answer | 0

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Question

Make rows of square bracket data
I have some data that looks like this string: A='[[1,2,3,4,5,6],[6,5,4,3,2,1],[4,4,4,4,4,4],[9,9,9,9,9,9]]' 6 numbers in...

2 years ago | 1 answer | 0

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Question

parfor loop with strings
I have the following parfor with functions F1-F3: S = strsplit(['hund kat jensen']); parfor J=1:length(S) if ...

2 years ago | 0 answers | 0

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Question

Get the row values with some rules
Hello, imagine I have a table where column 1 is string and column 2 is a ID, and column 3 is the value I want to recieve: 'h...

2 years ago | 0 answers | 0

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Question

Round down lowest number in a decimal number
Hello, say I have a number 4.214513. Then I need to return 4.21. Likewise if I have 4.219999, I need to return 4.21. Is there an...

2 years ago | 1 answer | 0

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Question

Need digest output from HMAC sha-256
Hello. I need to Generate a HMAC-key by base64-decoding a given key (resulting in 64 bytes). Then I need to use the HMAC-key ...

2 years ago | 0 answers | 0

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Question

Authentication GDAX exhcange API, signing-problem
Hello, I got problem connecting GDAX exchange API and it looks like I fail in delivering the signature because it responds: "inv...

2 years ago | 0 answers | 1

### 0

Question

Remove and clear things in a table for presentation
I have a table like this: T = 2x3 table percent cars cats ________ _________...

2 years ago | 2 answers | 0

Question