Home / user-192919

Nicx R's questions

Martin Hope
Nicx R
Asked: 2021-11-29 14:07:03 +0800 CST
  • 1

I need to change the ratio between the X and Y axes from 1:1 to 1:2, that is, I need the values ​​on the y axis to go two by two and those on the x axis to remain the same. I need it because one of my graphs is too long on the y-axis. enter image description here

Look at my code:

\begin{center}
    \begin{tikzpicture}[scale=0.72]
        \draw [->](-5,0) -- (5,0) node[below] {$x$};
        \draw [->](0,-7) -- (0,5) node[right] {$y$};
        \foreach \y in {-7,-5,-3,-1,1,3,5}
        \draw (0,\y) -- (-0.1,\y) node[left,scale=0.7] {\y};
        \foreach \x in {-5,-3,-1,1,3}
        \draw (\x,0) -- (\x,-0.1) node[below,scale=0.7] {\x};
        \clip (-5,-7) rectangle (5,5);
        \draw[color=olive,thick, domain=-5:5,smooth, samples=29] plot (\x, {pow(\x,4)+4*pow(\x,3)});
    \end{tikzpicture}
    \end{center}
latex
Martin Hope
Nicx R
Asked: 2021-10-18 14:25:56 +0800 CST
  • 3

I have tried to graph some trigonometric functions in LaTex and I succeeded but I couldn't with this sin(8πx) which could be approximated as sin(25x) but it seems that the bigger the number that multiplies x, the more LaTex starts to show the graph every time more deformed until it no longer shows it. Is there a way to graph that function?

This is my code:

\begin{center}
\begin{tikzpicture}
\draw [->] (-3.5,0) -- (3.5,0) node[below] {$x$};
\draw [->] (0,-1.5) -- (0,1.5) node[left] {$y$};
\draw (3.14,0) node[below] {$\pi$};
\draw (-3.14,0) node[below] {$-\pi$};
\draw [color=olive, thick,domain=-3.14:3.14] plot (\x,{sin(25*\x r)});
\end{tikzpicture}
\end{center}

In image 1 you see sin(20x). In image 2 it shows me sin(25x)

This is what sin(20x) looks like

And for some reason it shows me sin(25x)

latex
Martin Hope
Nicx R
Asked: 2020-09-23 08:34:35 +0800 CST
  • 1

I have to organize a thousand data that is in a text file in 10 categories, I have already managed to import the data into R, and create the intervals but I do not know how to organize the data in these intervals, what I need to know is how much data is there in each interval . I hope you can help me.

# establecer el directorio de trabajo
setwd(dir = "C:/Users/DELL/Documents/Texto/")

# importar base de datos en el objeto llamado base_de_datos
base_de_datos <- read.table(file = "taller03_datos.txt")

# extraer los valores de la varible en el objeto llamado cal
cal <- base_de_datos$V1

# tamaño de la muestra
n <- length(cal)

#Máximo y Mínimo
Max <- max(cal)
Min <- min(cal)

#Rango
R <- Max - Min

#promedio aritmético
M <- mean(cal)

#amplitud del intervalo
a <- R/10

#intervalos
li <- seq(from=Min, to= Max-a, by=a)
ls <- seq(from=Min+a, to= Max, by=a)

# Marca de clase
Mc <- (li+ls)/2

# Frecuencia absoluta

#Tabla
tabla <- cbind(li,ls)
r