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Jakob B. Nielsen


Last seen: 11 days ago Active since 2019

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Answered
Finding the 95% fit on an exponential graph
There really should be a clever way to extract that info! I've looked at the cftool and I can't find an easy way. There is a rat...

2 months ago | 0

Answered
how to get unique value of datetime and sum all of the value ?
Hi Muhannad, You have made a good start, you have a list of all unique dates in your unqdate. One thing I would recommend is to...

2 months ago | 0

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Answered
How to insert a row and shift cells down in excel
I believe you can achieve this using Excel.Run('InsertRow'); you might have to have the relevant row selected before it works...

2 months ago | 0

Answered
how to run a code to several files in a folder?
You can manage this using for loops, provided that your datafiles are named in an incremental manner. Example, you have 10 files...

2 months ago | 0

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Answered
scatter plotting of string data
Check https://se.mathworks.com/help/matlab/matlab_prog/convert-table-variables-containing-strings-to-categorical.html

2 months ago | 0

Answered
average value of group of cells in a matrix
You are on the right track! You do, indeed, want to use two for loops, because you are trying to perform operations in two dimen...

2 months ago | 0

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Answered
plotting data with a 1*1 struct
Just play around a little bit with how you call specific indices out of a structure, it will become easy once you get the hang o...

2 months ago | 0

Answered
Uninstall older releases of MATLAB
If you navigate to C:\Program Files\MATLAB You should see a folder for each version you have installed. I find my uninstall in ...

2 months ago | 1

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Answered
Colouring different regions on a graph.
Plot stepwise segments of your data? For example: data=1000*rand(1000,1); data=sort(data); x=1:1:1000; start=1; figure fo...

2 months ago | 0

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Question


sqlwrite object already exists
Greetings excellent people! (I am aware that a question already exists with roughly the same name, but it is several years old...

2 months ago | 0 answers | 0

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Question


ActiveX interacting with dialogue boxes
Greetings, everyone! I routinely use activex to play around with excel files via matlab, but recently I've come across a bit o...

3 months ago | 0 answers | 0

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Answered
For loop for a function
You construct the for loop like this: for i=1:size(age,2) %by referencing your age array, you can change the age values and it ...

6 months ago | 0

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Answered
how to combine two plots in one figure
In your code, you input the initial x and v during every loop iteration - not the most recent x and v. That is why you just get ...

6 months ago | 0

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Question


Matlab compiler error during packaging - "no error"
Good day, fine community! I am experiencing a problem which has me kind of puzzled. I have created a GUI that I have succesful...

6 months ago | 1 answer | 0

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Answered
How can I create a listbox with the content of an structur/array?
You create the listbox inside a loop. That means every loop iteration, you make a listbox on your selected position with only th...

1 year ago | 0

Answered
How to do Weighted Historical Simulation?
I think you just need to move your parantheses in the function, to contain the entire logic statement. function [VaR,n_tau] ...

1 year ago | 0

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Oscillations - Determining amplitude and frequency values
Take a look at the builtin fourier analysis which is just perfect for an application such as the one you describe.

1 year ago | 0

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How to publishing script with function
Your question is a little vague, but if you mean what I think you mean - namely to compile a script but for the compiled version...

1 year ago | 0

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plot values in the loop
do plot(k,d,'o-') instead, that will give you o's connected by lines.

1 year ago | 0

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Setting position of Annotation on an axes component
Hi Jason, When you get the position of an axes, the first and second index are the start location of your axes in the x and y d...

1 year ago | 0

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Answered
Continue if file doesn't exist - pop_loadset
Use the exist or isfile functions. E.g. for i = sub for j = run if exist(['.../2_correctTriggers/',sprintf('p0%...

1 year ago | 1

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Answered
How do i create a variable as index for vector m for my code below.
Your issue is that if you make a for loop for 0.1 to 1000, and then use that same counter as an index, when you then type M(omeg...

1 year ago | 0

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Answered
plot vector with string timestamp
Take a look at the datetick function.

1 year ago | 0

Answered
Sum of signals and filter the sum and recuperate the inicial frequencies
Making the simulated signal is quite simple. First, make a vector t which covers the time domain you are interested in. Then, ge...

1 year ago | 1

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Answered
Multiple Input/output function to excel
You can achieve this in many ways. The simplest way would be to just create arrays of your input ranges, for example in2=0:0.0...

1 year ago | 1

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compiling Matlab files not clear
Hi farzad, It is definitely possible to compile an m file to a standalone exe file, for example in the form of a GUI / app. Whe...

1 year ago | 1

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Answered
Can Matlab handle segmented graphs and automatic trendlines?
The answer to all four questions is yes. You can execute several plots in the same figure, as well as on the same axes (axes i...

1 year ago | 1

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Answered
How to centre textboxes on the plot outline?
First, make a handle for your figure: ax=axes; plot(ax,t,x); Next, when you set the dimensions of your textbox, refer b...

1 year ago | 1

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Answered
scalar vs nonscalar structure: advantages?
There are probably people out there much smarter than me, so take this with a grain of salt. If it were me, I would choose tha...

1 year ago | 0

Answered
How to combine multiple files into one .csv
If I run your code and pause it after the first execution of the for loop, the num variable is empty, so something might be up w...

1 year ago | 0

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