replace all "-" with "0"

conv-min-zero.sh

# replace all "-" with "0" in test2
sed -i -e 's/-;/0;/g' -e 's/-$/0/g' test2

# replace all "-" with "0" in all files in local directory
for i in *; do sed -i -e 's/-;/0;/g' -e 's/-$/0/g' $i; done

# replace all "-" with "0" in all files in all subdirectories
for i in */*; do sed -i -e 's/-;/0;/g' -e 's/-$/0/g' $i; done

# replace all "-" with "0" in all *.csv files in all subdirectories
for i in */*.csv; do sed -i -e 's/-;/0;/g' -e 's/-$/0/g' $i; done