regex101: Polynomial extractor with real coefficient

Group 1([+-]?(?:(?:\d+\.?\d*\*?[xX]\^\d+)|(?:\d+\.?\d*\*?[xX])|(?:[xX]\^\d+)|(?:[xX])|(?:\d+\.?\d*)))

Character Class[+-]?

?matches at most one character from the set below:

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:(?:\d+\.?\d*\*?[xX]\^\d+)|(?:\d+\.?\d*\*?[xX])|(?:[xX]\^\d+)|(?:[xX])|(?:\d+\.?\d*))

1st Alternative(?:\d+\.?\d*\*?[xX]\^\d+)

Non-Capturing Group(?:\d+\.?\d*\*?[xX]\^\d+)

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

\*?optionally matches the literal * (42₁₀ / 52₈ / 2A₁₆)

Character Class[xX]

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

\^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

\d+a digit, repeated at least once

2nd Alternative(?:\d+\.?\d*\*?[xX])

Non-Capturing Group(?:\d+\.?\d*\*?[xX])

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

\*?optionally matches the literal * (42₁₀ / 52₈ / 2A₁₆)

Character Class[xX]

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

3rd Alternative(?:[xX]\^\d+)

Non-Capturing Group(?:[xX]\^\d+)

Character Class[xX]

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

\^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

\d+a digit, repeated at least once

4th Alternative(?:[xX])

Non-Capturing Group(?:[xX])

Character Class[xX]

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

5th Alternative(?:\d+\.?\d*)

Non-Capturing Group(?:\d+\.?\d*)

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

([+-]?(?:(?:\d+\.?\d*\*?[xX]\^\d+)|(?:\d+\.?\d*\*?[xX])|(?:[xX]\^\d+)|(?:[xX])|(?:\d+\.?\d*)))

Test String
New

-5.0x^5 + 20x^4 +x^3 + x +2
5*x^4 + 2.5*x + 3

Regular Expressions 101

Regular Expression

Test String
New

Extraction
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Regular Expression

Test StringNew

ExtractionProcessing...

Test String
New

Extraction
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