Differences

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--- b:head_first_statistics:visualization [2025/09/03 08:41] – [box plot] hkimscil
+++ b:head_first_statistics:visualization [2025/09/08 08:22] (current) – [Histogram Modality] hkimscil
@@ Line 91: / Line 91: @@
 </code>
 {{:b:head_first_statistics:pasted:20240904-082258.png}}
+<code>
+dat.iq <- rnorm(1000, 100, 15)
+head(dat.iq)
+tail(dat.iq)
+head(dat.iq, n=12)
+tail(dat.iq, n=12)
+mean(dat.iq)
+sd(dat.iq)
+hist(dat.iq)
+hist(dat.iq, breaks=30, col='lightblue')
+set.seed(101)
+dat.iq <- rnorm(1000, 100, 15)
+head(dat.iq)
+tail(dat.iq)
+head(dat.iq, n=12)
+tail(dat.iq, n=12)
+mean(dat.iq)
+sd(dat.iq)
+hist(dat.iq)
+hist(dat.iq, breaks=30, col='lightblue')
+</code>
 ====== Scatter plot ======
 <code>
@@ Line 251: / Line 278: @@
 <WRAP clear/>
+====== Histogram Modality======
 <WRAP column half>
+Unimodal
 <code>
 ### unimodal data
@@ Line 271: / Line 300: @@
 <WRAP clear/>
+Bimodal distribution
 <WRAP column half>
 <code>
@@ Line 292: / Line 321: @@
 </WRAP>
 <WRAP clear/>
 <WRAP column half>
@@ Line 303: / Line 331: @@
 # Parameters for the second normal distribution (Mode 2)
 m.2 <- 100
-sd.2 <- 8
+sd.2 <- 15
 m.3 <- 160
@@ Line 311: / Line 339: @@
 prop.1 <- 0.3
 # Mixing proportion for Mode 2
-prop.2 <- 0.4 # This is 1 - prop1
+prop.2 <- 0.6 # This is 1 - prop1
 # Mixing proportion for Mode 2
-prop.3 <- 0.3 # This is 1 - prop1
+prop.3 <- 1.0 # This is 1 - prop1
 # Number of samples to generate
@@ Line 347: / Line 374: @@
 </WRAP>
 <WRAP column half>
-{{:b:head_first_statistics:pasted:20250903-082247.png}}
+{{:b:head_first_statistics:pasted:20250908-082219.png}}
 </WRAP>
 <WRAP clear/>
@@ Line 353: / Line 380: @@
 ====== box plot ======
+<WRAP column half>
 <code>
 # Boxplot of MPG by Car Cylinders
@@ Line 361: / Line 388: @@
     ylab="Miles Per Gallon")
 </code>
-{{:c:ps1-1:2019:pasted:20190909-111438.png}}
+</WRAP>
+<WRAP column half>
+{{:c:ps1-1:2019:pasted:20190909-111438.png}}
+</WRAP>
+<WRAP clear/>
 ====== see also ======
 https://r-graph-gallery.com/