# Haris K.

I am an economist and econometrician with over 10 years of experience in playing with scatter plots and the letters of the Greek alphabet (particularly alpha, beta and epsilon).

**Programming Languages:**

Python, MATLAB

**Professional Interests:**

Time Series Analysis, Macroeconomics

**Statistics**

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**Content Feed**

Question

How to merge new variables and append new rows at the same time (when synchronizing timetables)?

Hi. Below, I have 2 timetables (R1, R2) that I am trying to combine into a single timetable (M). What I am trying to achieve ...

6 months ago | 2 answers | 0

### 2

answersSubmitted

Interface to easily access FRED® data

Easily download economic data from FRED (Federal Reserve Economic Data), connecting to the FRED server (https://fred.stlouisfed....

12 months ago | 2 downloads |

Matlab Editor does not respond to keyboard inputs

Same problem here. I am using MATLAB R 2020b. Same issue like everybody else. Shortcuts like Ctrl+C and Ctrl+V work. Selecting...

2 years ago | 0

Question

Lag order selection in multivariate time series models using recursive programming

Hi. I am trying to create a recursive function that runs a model comparison procedure and selects the optimal lag order using in...

2 years ago | 0 answers | 1

### 0

answersHow to select the desired color of the point in stat_summary('geom',{'point'}) in the Gramm Toolbox?

With a little bit of searching through the created structure, I have found one solution. g.results.stat_summary.point_handle.M...

2 years ago | 1

| accepted

Question

How to select the desired color of the point in stat_summary('geom',{'point'}) in the Gramm Toolbox?

Hi. I am making a violin plot with a box plot inside, using the Gramm toolbox. I would like to also show the mean, but I do not ...

2 years ago | 1 answer | 0

### 1

answerFrom index list to logical index vector

I changed the variable names for brevity. function lgc = unfind(idx, N) %Go from indicies into logical (for vectors only) ...

2 years ago | 2

Question

How to include all variables in each decision tree of an ensemble?

Hi everyone. I am fitting the following 10-tree ensemble. X = rand(1000,50); Y = rand(1000,1); N = size(X,2); Ntrees=10; t...

2 years ago | 1 answer | 0

### 1

answerQuestion

Why the ‘CategoricalPredictors’ properties are always empty after running fitrensemble()?

Hi. I am running a regression tree ensemble, and despite specifying a categorical variable using name-value pair 'CategoricalPre...

2 years ago | 1 answer | 0

### 1

answerDoes the fitrtree algorithm treat categorical and continuous variables differently?

After your response, I tried to check with a more complicated example. Assume 1000 obs, 20 continuous features, and 1 categorica...

2 years ago | 1

Does the fitrtree algorithm treat categorical and continuous variables differently?

You can see if the two are equivalent using a simple example. The example below shows that Cases 1 & 2 are equivalent. NOTE howe...

2 years ago | 1

Question

How to retrieve optimal MinLeafSize after automatic hyperparameter optimization for Tree Ensemble (fitrensemble)?

Hi. I am running MATLAB's automatic Bayesian optimization for a number of parameters for a Tree Ensemble. opts = struct('Kfold...

2 years ago | 1 answer | 1

### 1

answerQuestion

Check for optional inputs in a function using exist

Hi everyone. Is it wrong, prone to mistakes, or slower to check the existance of optional arguments in a function using exist()?...

3 years ago | 1 answer | 0

### 1

answerTurn logical matrix into string vector

Btw, here is one solution: arrayfun(@(i) vec(idx(i,:)),1:size(idx,1))' But I was wondering if there is something that does not...

3 years ago | 1

Question

Turn logical matrix into string vector

Hi. I have the logical matrix idx and the string array vec. idx = logical([0 1 0; 0 0 1; 1 0 0; 1 0 0; 0 1 0]) vec = ["A","B",...

3 years ago | 4 answers | 0

### 4

answersQuestion

Create new table variable filled with values from another table

Hi. I have the following tabels, T1 and T2: Name1=["A","B","C","D"]' Des1=["Shoubidou","Abra","Ca","Dabra"]' T1=table(Name1, ...

3 years ago | 1 answer | 0

### 1

answerQuestion

Change the format of all Datetime variables in a Table

Is there any way to change the format of all the datetime variables in a table? Var1 = datetime({'2015-12-18 08:03:05';'2015-12...

3 years ago | 1 answer | 0

### 1

answerSolved

Create an n-by-n null matrix and fill with ones certain positions

The positions will be indicated by a z-by-2 matrix. Each row in this z-by-2 matrix will have the row and column in which a 1 has...

3 years ago

Solved

Getting the indices from a vector

This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

3 years ago

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

3 years ago

Appropriate usage of Parallel Pool

Just in case someone finds this comparison helpful. I changed the methods a bit, as I realized that it is not a good practise to...

3 years ago | 1

| accepted

Question

Appropriate usage of Parallel Pool

Hi. I have two related questions: Question 1: Which of the following 4 is best to use in order to take advantage of my PC's mul...

3 years ago | 2 answers | 1

### 2

answersHow to change the Fonts in a text section (-not code) in Live Script

Briefly let me recap and post the solution. I copied some text from another document (which as it turns out, had the 'Lucida Con...

3 years ago | 1

| accepted

Question

How to change the Fonts in a text section (-not code) in Live Script

I copied some text from a '.doc' file and pasted it to the Live Editor (in a live script, i.e. '.mlx' file). As a result, it cop...

3 years ago | 1 answer | 0

### 1

answerQuestion

Problem in converting datetime to POSIX and then the same POSIX back to datetime

Given that I have specified the time zone in t, could you please explain why the last row will not convert it back to 'XXXX-XX-X...

3 years ago | 1 answer | 1

### 1

answerHow can I extract the time column of a timetable

You can also use directly: TT = timetable(Temp,Pressure,WindSpeed,WindDirection, 'RowTimes',MeasurementTime) datetime_vec = T...

3 years ago | 0