[BUG] src/layouts.jl floating point equality too strict

[penelopeysm]

Details

#4902 introduces a check on the sum of heights and widths in a plot layout.

Plots.jl/src/layouts.jl

Lines 229 to 232 in 8b9bcf2

	if widths !== nothing
	if sum(widths) != 1
	error("The sum of widths must be 1!")
	end

It's a bit too strict, though, which led to TuringLang/MCMCChains.jl#457 — our plot recipe generates widths of [0.3, 0.3, 0.3, 0.1] which don't add up to 1.

Backends

This bug occurs on ( insert x below )

Backend	yes	no	untested
gr (default)	x
pythonplot			x
plotlyjs			x
pgfplotsx			x
unicodeplots			x
inspectdr			x
gaston			x

Versions

Plots.jl version: v1.40.5
Backend version (]st -m <backend(s)>): v0.73.7
Output of versioninfo():

Julia Version 1.10.4
Commit 48d4fd48430 (2024-06-04 10:41 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: macOS (arm64-apple-darwin22.4.0)
  CPU: 10 × Apple M1 Pro
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, apple-m1)
Threads: 1 default, 0 interactive, 1 GC (on 8 virtual cores)
Environment:
  DYLD_FALLBACK_LIBRARY_PATH = /Users/pyong/.julia/artifacts/5902919ba30b97bafa388ca950a351ea32516d26/lib:/Users/pyong/.julia/artifacts/92b949e2f3a66439c69a8d334fc95810fbd9df9b/lib:/Users/pyong/.julia/artifacts/5b338c8fa90c05e6faea86e54d2996cca76cfbbe/lib:/Users/pyong/.julia/juliaup/julia-1.10.4+0.aarch64.apple.darwin14/lib/julia:/Users/pyong/.julia/artifacts/b8f5da6f57c2e2fc6e975f48076310a72e239e66/lib:/Users/pyong/.julia/artifacts/9410bad2635eda2239b4a72ba4316c4aa8f5b76e/lib:/Users/pyong/.julia/artifacts/e04c23df67d77af61db2b9bfb82096c50c14346d/lib:/Users/pyong/.julia/artifacts/807b3a94123d30a6923d6d303e22f466233a4ea6/lib:/Users/pyong/.julia/artifacts/07e6bd5ae846b525d0c43be96788967cfccb923b/lib:/Users/pyong/.julia/artifacts/e8b17d4e8df51de281bf55f890ba48f924e41ce3/lib:/Users/pyong/.julia/artifacts/8408d0a22293bf477615b4ae706ede8df2b6367e/lib:/Users/pyong/.julia/artifacts/b53d3c68aa0812e5ae574464a3198d17d79ded1a/lib:/Users/pyong/.julia/artifacts/bb74171086b39a991ff3f12027bdf216d0fe9bd3/lib:/Users/pyong/.julia/artifacts/65d6651eacd881039e256d64c458d1ebd0101013/lib:/Users/pyong/.julia/artifacts/a6b6a73123c51d64fc30aa1caf34364bacf0f8a5/lib:/Users/pyong/.julia/artifacts/3b3d0bcaf14a9b239a4f4dc20ef7b9e63030a47e/lib:/Users/pyong/.julia/artifacts/abf161ac3d4df76ae74bbf5432b7e061b3876236/lib:/Users/pyong/.julia/artifacts/4260cf51a368d8e305a5de3669e32539e1e6cc72/lib:/Users/pyong/.julia/artifacts/fc7ba632b72ce7d852c1924aa2bbfe244a71c780/lib:/Users/pyong/.julia/artifacts/115f3a18328d7b88e31c9e3f095aeb12eb381710/lib:/Users/pyong/.julia/artifacts/ca2831bf6edc5088aec5b329ea98364951d6cad0/lib:/Users/pyong/.julia/artifacts/477447566a69a531a7a3f8e0130cbfe460b37eec/lib:/Users/pyong/.julia/artifacts/8aeda74365ddd4a5b4b857356622b5c7612a3f2e/lib:/Users/pyong/.julia/artifacts/0db9c3f6cf936a0da49e2ba954ba3e10bed6ad72/lib:/Users/pyong/.julia/artifacts/1a7e22e66b523d9cb884cf85c3ec065b5fb3e5c3/lib:/Users/pyong/.julia/artifacts/2c629d59cfe52761e7b0760dcc1df5f1d43c3907/lib:/Users/pyong/.julia/artifacts/4609432e7098d8434a7a4c7876dd5b9e09b2a5e7/lib:/Users/pyong/.julia/artifacts/6095fcd268ea712c0f786f5ff1a45bf0eb7b005e/lib:/Users/pyong/.julia/artifacts/b17b8d5c7b4a2b9d0d81352efc80ce5b9da2553e/lib:/Users/pyong/.julia/artifacts/6b104f71c6fc2280dea4cd195cb6800737e8c9aa/lib:/Users/pyong/.julia/artifacts/b450526929615030746974fd622effa333c2c87a/lib:/Users/pyong/.julia/artifacts/fb653fdc268e50c0be4391f6ca2f2fce2be7f15b/lib:/Users/pyong/.julia/artifacts/3908ba61f3e144a7e7e28b9d676ca770f2f6a955/lib:/Users/pyong/.julia/artifacts/2107e7bc404f11b178cb9724cb371ef704995727/lib:/Users/pyong/.julia/artifacts/4b3b2d79556cc3aef6e3d8a234649cc85b91bb87/lib:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtConcurrent.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtCore.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtDBus.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtGui.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtNetwork.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtOpenGL.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtPrintSupport.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtSql.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtTest.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtWidgets.framework/Versions/A:/Users/pyong/.julia/artifacts/7f2122f84c49e5b75c5b4cbf46bbdeb3b0ffc5da/lib/QtXml.framework/Versions/A:/Users/pyong/.julia/artifacts/9cbd4bb5d69dad27b1c39fa28580935bfd0dc196/lib:/Users/pyong/.julia/juliaup/julia-1.10.4+0.aarch64.apple.darwin14/bin/../lib/julia:/Users/pyong/.julia/juliaup/julia-1.10.4+0.aarch64.apple.darwin14/bin/../lib:

[penelopeysm]

Oopsies, duplicate of #4959.

Working on PR now anyway!