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shell script | bc syntax format

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# 1  
Old 05-23-2012
shell script | bc syntax format
sorry but need help

Image

trying to achieve ema
in script I have this syntax which errors

Code:
ema=[`"$(echo (${currentprice} * 0.153846154) + (${previousema} * {1 - 0.153846154}) | bc)" -q 1 ]` ;

the 0.153846154 ='s Smoothing Factor

really appreciate help
Last edited by Franklin52; 05-23-2012 at 07:15 AM.. Reason: Please use code tags
# 2  
Old 05-23-2012
This may help

Code:
ema=`echo "(${currentprice} * 0.153846154) + (${previousema} * (1 - 0.153846154))" | bc`

This User Gave Thanks to sanjaypraj For This Post:
harte
# 3  
Old 05-23-2012
You are mixing more than one command.

Code:
ema=$(echo "($currentprice*0.153846154)+($previousema*(1-0.153846154))" | bc) 

if [ "$ema" -eq 1 ]; then
 echo do something
fi

This User Gave Thanks to clx For This Post:
harte
# 4  
Old 05-23-2012
nice guys thanks
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