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Top Forums UNIX for Beginners Questions & Answers Calculate e raise to the power in awk | UNIX Post 303041156 by genome on Friday 15th of November 2019 04:26:53 PM
Old 11-15-2019
Calculate e raise to the power in awk | UNIX

Input data:

Quote:
SNP MAF
10:60523:T:G 0.013
10:62010:C:T 0.01125
10:69083:C:T 0.3581
10:73537:G:A 0.005268
I'd like to calculate using value in second column. The value needs to be created using a formula, that employs exp (that is e raise to the power).

Code:
awk '{

if(FNR==1){ 
##if first line than print as is and add third column
print $0,"weight"
}

else{
if($2<=0.01){
##if MAF less than 0.01 

print $0, exp((1-$2)*25)/(1+exp((1-$2)*25))
}
else{
print $0, exp((0.5-$2)*0.5)/(1+exp((0.5-$2)*0.5))
} } }'   merged_allCHRs_headers  > merged_allCHRs_weights

I get output
Quote:
SNP MAF weight
10:60523:T:G 0.013 0.560576
10:62010:C:T 0.01125 0.560792
10:69083:C:T 0.3581 0.51773
10:73537:G:A 0.005268 1
I'd like ascertain what I'm doing is right.


Thanks
 

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DB2_RESULT(3)								 1							     DB2_RESULT(3)

db2_result - Returns a single column from a row in the result set

SYNOPSIS
mixed db2_result (resource $stmt, mixed $column) DESCRIPTION
Use db2_result(3) to return the value of a specified column in the current row of a result set. You must call db2_fetch_row(3) before calling db2_result(3) to set the location of the result set pointer. PARAMETERS
o $stmt - A valid stmt resource. o $column - Either an integer mapping to the 0-indexed field in the result set, or a string matching the name of the column. RETURN VALUES
Returns the value of the requested field if the field exists in the result set. Returns NULL if the field does not exist, and issues a warning. EXAMPLES
Example #1 A db2_result(3) example The following example demonstrates how to iterate through a result set with db2_fetch_row(3) and retrieve columns from the result set with db2_result(3). <?php $sql = 'SELECT name, breed FROM animals WHERE weight < ?'; $stmt = db2_prepare($conn, $sql); db2_execute($stmt, array(10)); while (db2_fetch_row($stmt)) { $name = db2_result($stmt, 0); $breed = db2_result($stmt, 'BREED'); print "$name $breed"; } ?> The above example will output: cat Pook gold fish Bubbles budgerigar Gizmo goat Rickety Ride SEE ALSO
db2_fetch_array(3), db2_fetch_assoc(3), db2_fetch_both(3), db2_fetch_object(3), db2_fetch_row(3). PHP Documentation Group DB2_RESULT(3)
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