Publications by Tautvydas Merkevičius
Projektai su R markdown
Užduotis: Labai trumpai charakterizuoti duomenų rinkiniai, sprendžiamas klasifikavimo uždavinys abiems pasirinktiems duomenų rinkiniams. Pasirinktiems duomenims sudarykite LDA klasifikatorių pagal pavyzdį 128-131 psl. iš 5 skyriaus “Machine learning with R, tidyverse and mlr”. Padarykite vieną “hold-out” testą ir išveskite klas...
4947 sym R (12095 sym/52 pcs) 2 img
Data visualization homework no.4
Create examples of bad visualizations with your data and then, correct versions. 4 erroneous visualizations and correct versions. 4 lyging/misleading vizualization and correct versions. Prepare data for visulizations: library(readr) library(tidyverse) library(DataExplorer) library(treemap) library(scales) library(dplyr) library(ggplot2) ca...
1527 sym R (6933 sym/18 pcs) 15 img
Data visualization homework no.2
Data visualization homework no.2 Describe your data: Data types. Statistcs (mean, min, max, etc. depending on the data types), use box plots and other similar plots to illustrate it. Create basic visualizations of your data Check for periodicity in your data, show it (if there is no seasonality, show that there is no seasonality) library(readr)...
1496 sym R (5871 sym/12 pcs) 7 img
Data visualization homework no.1
Data visualization homework no.1 Choose a data set (the number of data attributes should be more than 5), explain why it is important or interesting for you. Formulate research questions (for which you expect to find the answers) Make some visualizations for the formulated questions. Prepare a presentation (where you explain the data, questions,...
1873 sym R (3482 sym/8 pcs) 5 img
Data visualization homework no.3
Data visualization homework no.3 1.Chose 4 simple visualization methods (boxplot must be included) for your data visualization. 2.Present and upload your results. library(reshape2) library(readr) library(tidyverse) library(DataExplorer) library(treemap) library(scales) library(dplyr) library(ggplot2) cars <- read_csv("C:/Users/Tautvydas/D...
685 sym R (4986 sym/11 pcs) 6 img
PUASONAS+GAMMA
rm(list = ls()) #Gama distribution y <- (1:20) #p(y) integrand1 <- function(y) {(y^8)*exp(-y)} # integruojama int1 <- integrate(integrand1, lower = 0, upper = Inf) int1 ## 40320 with absolute error < 0.0013 py <- (10^9 / int1$value) * y^8 * exp(-10*y) #apskaičiuojama apriorinė tankio funkcija py ## [1] 1.125990e+00 1.308669e-02 1.522702...
21 sym R (3319 sym/15 pcs) 1 img
POISSON+RAYLEIGH
#Rayleigh distribution rm(list = ls()) y <- (1:20) library(SciViews) ## Warning: paketas 'SciViews' buvo sukurtas pagal R versiją 4.1.3 #aprašoma apriorinė tankio funkcija py <- (y / 0.516) * exp(-((y^2)/1.031)) #po 1 stebejimo, kai x1=2 integrand1 <- function(y) { (y / 0.516) * exp(-((y^2)/1.031)) * (exp(-y) * (y^2)/2 )} int1 <- inte...
61 sym R (7577 sym/55 pcs) 1 img
POISSON+LOGNORMAL
rm(list = ls()) #log-normal distribution #install.packages("nleqslv") library("nleqslv") fn <- function(x) { a <- exp(x[1] + x[2]/2) - 0.9 b <- (exp(x[2]) - 1) * (exp(2*x[1] + x[2])) - 0.09 return(c(a, b)) } # mean std nleqslv(c(1,5), fn) #gautos parametrų reikšmės: -0....
59 sym R (9943 sym/53 pcs) 1 img
bank data classification
Duomenų rinkinio “BANK MARKETING” klasifikavimas https://archive.ics.uci.edu/ml/datasets/bank+marketing Reikalingos bibliotekos uždaviniui spręsti: library(caret) library(mlr) library(dplyr) library(tidyr) library(readxl) library(e1071) library(parallelMap) library(parallel) library(rpart.plot) library(GGally) library(factoextra)...
10991 sym R (25603 sym/176 pcs) 14 img 1 tbl
Data visualization homework no.6
Home work no.6 Choose two methods from Multidimensional data: direct methods. Make visualizations. Prepare presentation and upload. library(reshape2) library(readr) library(tidyverse) library(DataExplorer) library(treemap) library(scales) library(dplyr) library(ggplot2) library(philentropy) library(hrbrthemes) library(GGally) library...
208 sym R (4550 sym/9 pcs) 4 img