Question: TASK The Lavaan Project (ugent.be) Replicate the Confirmatory Factor Analysis of the page: installing the lavaanPlot and generate the model plot (display the model graphically)
The Lavaan Project (ugent.be) Replicate the Confirmatory Factor Analysis of the page: installing the lavaanPlot and generate the model plot (display the model graphically) The lavaan Project We call these expressions latent variable definitions because they define how the latent variables are 'manifested by' a set of observed (or manifest) variables, often called 'indicators'. Note that the special "=~" operator in the middle consists of a sign ("=") character and a tilde ("~") character next to each other. The reason this model syntax is so short is that behind ... llavan.ugent.be |
2.TAREA
Creating a summary of the corresponding paper, indicating:
Problem raised. Viable solutions. Related cases. Potential future research.
Group 1:
| S01235228 | Almonte Rodriguez, Fred G | ||
| S00919995 | Alvarado Adorno, Ellaise A | ||
| S00257228 | Cartagena Rivera, Ricardo | ||
| S01480722 | Cruz Olmo, Yaleiska | ||
| S01083215 | Davila Borges, Samarie N | ||
| S01429007 | Fino Sanchez, Francyhelena | ||
| S00515635 | Lazu Montanez, Miguel A |
Grupo2:
| S01143399 | Martinez Claudio, Yarelis | ||
| S01174491 | Ortiz Valentin, Rosaura | ||
| S00685877 | Rivera Berrios, Hecters M | ||
| S00923053 | Rivera Hernandez, Ruben J | ||
| S00259570 | Rodriguez Lopez, Ana M | ||
| S00007747 | Rodriguez Vazquez, Luis E | ||
| S01508547 | Salgado Santiago, Senia |
delivering the report and a presentation summarizing the work (10-15 s)
References
https://mail.google.com/mail/u/1?ui=2&ik=17b483558c&attid=0.1&permmsgid=msg-f:1731365775895108234&th=18070c00007f1a8a&view=att&disp=inline
https://mail.google.com/mail/u/1?ui=2&ik=17b483558c&attid=0.2&permmsgid=msg-f:1731365775895108234&th=18070c00007f1a8a&view=att&disp=inline
The lavaan Project (ugent.be)
t. 3
Play in the XAMMP tool (local server on your computer) queries based on
JOINS appearing in:
SQL Joins (w3schools.com)
SQL INNER JOIN Keyword (w3schools.com)
SQL LEFT JOIN Keyword (w3schools.com)
SQL RIGHT JOIN Keyword (w3schools.com)
Explain the differences between each of them
Transform each Join query into a query based on Table Cartesian Products.
Although the result is the same. What is the internal difference?
Explaining SQL commands
1.SQL joins It join tables
2.SQL INNER JOIN
It returns rows that have matching values in both tables
3.SQL LEFT JOIN
It returns all rows from the left tables, and the matching rows from the right table
4.SQL RIGHT JOIN
It returns all rows from the right table, and the matching rows from the left table.
USE THE FOLLOWINGTABLES (in the section below)
Explanation:
Table 1
| ID | NAME | AGE | ADDRES | SALARY |
| 123 | Ronex | 25 | ||
| 125 | Vincent | 26 |
Table2
| OID | DATE | CUSTOMER-ID | AMOUNT |
| 101A | 1/3/2021 | 6 | 7000 |
| 102A | 5/3/2021 | 8 | 8000 |
1.CARTESIAN JOIN
SELECT ID, NAME, AMOUNT, DATE
FROM CUSTOMERS, ORDERS;
2.SQL INNER JOINSELECT Table1.column, Table1.column2, Table2.column1, Table2.column2
FROM Table
GROSS JOIN Table2;
3. SQL LEFT JOIN
SELECT *
FROM Table1
LEFT JOIN Table2
ON Table2.table1_ID=table1_ID;
4.SQL RIGHT JOIN
SELECT *
FROM Table2
RIGHT JOIN Table1
ON Table1.table2_ID=Table2_ID;
t4
C:\Users\marav\Downloads\Path Analysis with R.docx
Description Builds the Diagrammer function call.
Usage
buildCall(
name = name,
model = model,
labels = labels,
graph_options = list(overlap = "true", fontsize = "10"),
node_options = list(shape = "box"),
edge_options = list(color = "black"),
...
)
Arguments
name A string of the name of the plot.
model A model fit object of class lavaan.
labels An optional named list of variable labels fit object of class lavaan.
graph_options A named list of graph options for Diagrammer syntax.
node_options A named list of node options for Diagrammer syntax.
edge_options A named list of edge options for Diagrammer syntax
. ... additional arguments to be passed to buildPaths
Value
A string specifying the path diagram for model
buildLabels Adds variable labels to the Diagrammer plot function call.
Description
Adds variable labels to the Diagrammer plot function call.
Usage
buildLabels(label_list)
buildPaths
Arguments
label_list A named list of variable labels.
Description
Extracts the paths from the lavaan model.
Usage
buildPaths
( fit,
coefs = FALSE,
sig = 1,
stand = FALSE,
covs = FALSE,
stars = NULL,
digits = 2
)
Arguments
fit A model fit object of class lavaan.
coefs whether or not to include significant path coefficient values in diagram
sig significance level for determining what significant paths are
stand Should the coefficients being used be standardized coefficients
covs Should model covariances be included in the diagram
stars a character vector indicating which parameters should include significance stars
be included for regression paths, latent paths, or covariances. Include which of
the 3 you want ("regress", "latent", "covs"), default is none.
Digits A number indicating the desired number of digits for the coefficient values in
the plot
embed_plot_pdf Embeds a plot into an rmarkdown pdf
Description
Embeds a plot into an rmarkdown pdf
Usage
embed_plot_pdf(plot, path)
Arguments
plot plot object created by lavaanPlot
path Filename to save the image
Value
no return value calls include_graphics to embed plot in pdf
Examples
library(lavaan)
model <- 'mpg ~ cyl + disp + hp
qsec ~ disp + hp + wt'
fit <- sem(model, data = mtcars)
pl <- lavaanPlot(model = fit)
## Not run:
embed_plot_pdf(pl, "plot2.pdf")
## End(Not run)
getNodes Extracts the paths from the lavaan model.
Description
Extracts the paths from the lavaan model.
Usage
getNodes(fit)
Arguments
fit A model fit object of class lavaan.
lavaanPlot Plots lavaan path model with DiagrammeR
Description
Plots lavaan path model with DiagrammeR
Usage
lavaanPlot(name = "plot", model, labels = NULL, ...)
Arguments
name A string of the name of the plot.
Model A model fit object of class lavaan.
labels An optional named list of variable labels
. ... Additional arguments to be called to buildCall and buildPaths
Value
A Diagrammer plot of the path diagram for model
Examples
library(lavaan)
model <- 'mpg ~ cyl + disp + hp
qsec ~ disp + hp + wt'
fit <- sem(model, data = mtcars)
lavaanPlot(model = fit, node_options = list(shape = "box", fontname = "Helvetica"),
edge_options = list(color = "grey"), coefs = FALSE)
save_png Saves a plot as a png
Description
Saves a plot as a png
Usage
save_png(plot, path)
Arguments
plot plot object created by lavaanPlot
path Filename to save the image
Value
no return value saves plot as png
Examples
library(lavaan)
model <- 'mpg ~ cyl + disp + hp
qsec ~ disp + hp + wt'
fit <- sem(model, data = mtcars)
pl <- lavaanPlot(model = fit)
## Not run:
save_png(pl, "plot.png")
## End (Not run)
sig_stars Generates standard significance stars
Description
Generates standard significance stars
Usage
sig_stars(pvals)
Arguments
pvals
Index
buildCall, 2
buildLabels, 2
buildPaths, 3
embed_plot_pdf, 4
getNodes, 4
lavaanPlot, 5
save_png, 5
sig_stars, 6
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