sum_xml_attr.sh

#!/bin/bash

filename="$1"
parameter="$2"

if [[ ! -f "$filename" ]]; then
    echo "Please specify the file"
    exit 1
fi

if [[ -z "$parameter" ]]; then
    echo "Please specify the xml attribute"
    exit 1
fi

grep -oE "$parameter=\"[0-9]+\.[0-9]+\"" "$filename" | sed -e "s/^$parameter=\"//" -e "s/\"$//" | awk '{sum+=$1} END{print sum;}'