# Jakob B. Nielsen

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**Content Feed**

Problem tracking a value to plot.

You have a problem with indexing. Every time you say V=Vnew, your V is simply replaced with a new overwritten value. You have an...

3 maanden ago | 0

| accepted

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...

8 maanden ago | 0

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...

8 maanden ago | 0

| accepted

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...

8 maanden ago | 0

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...

8 maanden ago | 0

| accepted

scatter plotting of string data

Check https://se.mathworks.com/help/matlab/matlab_prog/convert-table-variables-containing-strings-to-categorical.html

8 maanden ago | 0

| accepted

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...

8 maanden ago | 0

| accepted

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...

8 maanden ago | 0

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 ...

8 maanden ago | 1

| accepted

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...

8 maanden ago | 0

| accepted

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...

8 maanden ago | 0 answers | 0

### 0

answersQuestion

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...

8 maanden ago | 0 answers | 0

### 0

answersFor 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 ...

11 maanden ago | 0

| accepted

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 ...

11 maanden ago | 0

| accepted

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...

11 maanden ago | 1 answer | 0

### 1

answerHow 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...

meer dan een jaar ago | 0

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] ...

meer dan een jaar ago | 0

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.

bijna 2 jaar ago | 0

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...

bijna 2 jaar ago | 0

plot values in the loop

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

bijna 2 jaar ago | 0

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...

bijna 2 jaar ago | 0

| accepted

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%...

bijna 2 jaar ago | 1

| accepted

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...

bijna 2 jaar ago | 0

| accepted

plot vector with string timestamp

Take a look at the datetick function.

bijna 2 jaar ago | 0

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...

bijna 2 jaar ago | 1

| accepted

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...

bijna 2 jaar ago | 1

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...

bijna 2 jaar ago | 1

| accepted

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...

bijna 2 jaar ago | 1

| accepted

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...

bijna 2 jaar ago | 1

| accepted

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...

bijna 2 jaar ago | 0