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47 lines
2.2 KiB
Plaintext
47 lines
2.2 KiB
Plaintext
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#!/bin/sh
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# validate expression
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originalEquation=$(echo "$2" | sed "s/\[/\(/g" | sed "s/\]/\)/g")
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parsedExpression=$(echo "$2" | sed "s/\[/\(/g" | sed "s/\]/\)/g" | grep -Eo "[0-9 + -- / * ^ . a-z A-Z ~ : ( ) ]*")
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if [ "$parsedExpression" != "$originalEquation" ]; then
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echo "Error: Expression contains invalid characters"
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return 1
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fi
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equation=$(echo "$originalEquation" | sed "s:/:(over):g" | sed "s/~/|/g" | sed "s/-/%2D/g")
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operation=$(echo "$1" | tr "[[:upper:]]" "[[:lower:]]")
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curl -s https://newton.now.sh/api/v2/$operation/"$equation" | grep -Eo '"result":"[a-z A-Z 0-9 ( ) \^ / -- + , ]*' | sed s/'"result":"'//g | tr '"' " "
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# Usage: newton [operation] [expression]
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# Examples:
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# ===================================================
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# |Operations Sample Expression Sample Result|
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# |---------------------------------------------------|
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# |Simplify [[2x^2]+7]*[4x^2] 8 x^4 + 28 x^2 |
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# |Factor x^2 + 2x x (x + 2) |
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# |Derive x^2+2x 2 x + 2 |
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# |Integrate x^2+2x 1/3 x^3 + x^2 +C|
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# |Roots/Zeroes x^2+2x 2, 0 |
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# |Tangent 2~x^3 12 x + -16 | (Finding tangent line when x=2 for expression x^3)
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# |Area 2:4~x^3 60 | (Finding area under curve from 2 to 4 for expression x^3)
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# |Cos pi -1 |
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# |Sin pi 0 |
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# |Tan pi/4 1 |
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# |ArcCos 1 0 |
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# |ArcSin 0 0 |
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# |ArcTan pi arcsin(pi) |
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# |Abs -2 2 |
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# |Log 2~8 3 | (Log base 2 of eight)
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# ===================================================
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# Valid Symbols:
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# + add
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# - subtract
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# [ left parenthesis (you must use brackets bash has a bultin for parenthesis)
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# ] right parenthesis (you must use brackets bash has a bultin for parenthesis)
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# * multiply
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# / divide
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# ^ power
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# : between the range of left and right side (only for area under curve)
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# ~ parameter on right side (only for area, tangent line and log)
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