initial commit

math.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+DIRECTORY=$(cd `dirname $0` && pwd)
+. /home/spezi/Scripts/utils/utils.sh
+
+# https://unix.stackexchange.com/questions/66766/float-operation-with-bc
+# https://unix.stackexchange.com/questions/89712/how-to-convert-floating-point-number-to-integer
+# xargs: https://stackoverflow.com/questions/19148370/piping-seq-to-printf-for-number-formatting
+divideint () {
+    bc <<< "scale=$scale; $1/$2" | xargs printf "%.0f\n"
+}
+
+multiint () {
+    bc <<< "scale=2; $1*$2" | xargs printf "%.0f\n"
+}
+
+divide () {
+    if [ -z $3 ]; then
+        scale=2
+    else
+        scale=$3
+    fi
+    bc <<< "scale=$scale; $1/$2"
+}
+
+multiply () {
+    if [ -z $3 ]; then
+        scale=2
+    else
+        scale=$3
+    fi
+    bc <<< "scale=$scale; $1*$2"
+}
+
+avgoftwo () {
+    sum=$(bc <<< "$1+$2")
+    divideint $sum 2
+}
+
+max () {
+    declare -a allnumbers
+    for arg in "$@"; do
+        if isarray $arg; then
+            for elem in ${arg[@]}; do
+                [[ $elem -eq $elem ]] && allnumbers+=($elem)
+            done
+        else
+            [[ $arg -eq $arg ]] && allnumbers+=($arg)
+        fi
+    done
+    max=${allnumbers[0]}
+    for n in "${allnumbers[@]}"; do
+        ((n > max)) && max=$n
+    done
+    echo $max
+}
+
+min () {
+    declare -a allnumbers
+    for arg in "$@"; do
+        if isarray $arg; then
+            for elem in ${arg[@]}; do
+                [[ $elem -eq $elem ]] && allnumbers+=($elem)
+            done
+        else
+            [[ $arg -eq $arg ]] && allnumbers+=($arg)
+        fi
+    done
+    min=${allnumbers[0]}
+    for n in "${allnumbers[@]}"; do
+        ((n < min)) && min=$n
+    done
+    echo $min
+}