Research software reads formats that predate most of the web and rarely come with a clean sample. This category ships small, valid, fully synthetic ones. Chemistry covers MDL molfiles and SDfiles, XYZ coordinates, SMILES strings, crystallographic CIF, and PDB structures for an invented molecule. Bioinformatics covers FASTA and FASTQ sequences with documented quality encodings, SAM alignments, BED intervals, GFF3 annotations, and Newick phylogenetic trees. Numerical and gridded data arrive as NetCDF, HDF5, FITS, and Matrix Market alongside CSV twins so a loader can be checked against readable values. Citation formats (BibTeX, RIS) complete the set. Nothing here describes a real sample, organism, patient, or observation, the values are generated from fixed seeds and documented in each file's spec.
Filter scientific on Browse · 128 files · 11 subcategories
Results start with a representative from each related test family. Use a card’s variant menu or the filters below to reach a specific format, profile, or failure case; every sample retains its own detail page and download.
MDL molfiles and SDfiles, XYZ, SMILES, CIF, and PDB on the chemistry side; FASTA, FASTQ, SAM, BED, GFF3, and Newick trees on the bioinformatics side.
No. Every molecule, sequence, structure, and measurement is generated from a fixed seed and documented in the spec table, no real organism, patient, sample, or observation is described.
NetCDF, HDF5, and FITS fixtures ship with a documented variable/header listing and, where useful, a CSV twin carrying the same values in readable form.
Start with one example from each use-case group, then continue through its other test families. Choose a use case, search, or filter to find a specific profile; a card’s variant menu contains its related samples.
44 test families · 128 available files · Page 1 of 3
Arrays
Every element of the float64 .npy array written as its shortest round-tripping decimal representation, one row per element in C order. Parsing this text back to float64 reproduces the binary array bit for bit, so it is a
Bioinformatics
The same six features as the GFF3 file expressed in BED's 0-based half-open coordinates, where the start is one lower and the end is unchanged. Confusing the two conventions shifts every interval by a base, and this pair
Chemistry
Benzene written in the V3000 extended format, where the legacy counts line reports zero atoms and the real counts live in an M V30 COUNTS record. A parser that trusts the old counts line reads an empty molecule and repor
Fits
A FITS binary table with four typed columns, big-endian numerics packed with no inter-field padding and TUNIT declaring milli-jansky on the two flux columns. It is the fixture for a table reader that has to build a row s
Gridded
Every value from the CF-1.8 NetCDF grid flattened to one row per cell, with the axis values spelled out in full. Diff a NetCDF-to-table export against this file to prove the reader walked the dimensions in (time, lat, lo
Hdf5
One array stored twice in the same file: chunked with the shuffle and gzip filters applied, and contiguous with no filters at all. Comparing the two proves a reader ran the HDF5 filter pipeline rather than reading raw ch
Imaging
Every element of the synthetic phantom dataset as tag, value representation, meaning and encoded length, in the ascending tag order the standard mandates. Diff a parser's element list against it to check both the orderin
Matrices
An intentionally corrupt Matrix Market file whose banner and size line are perfectly valid and whose entry block stops seven lines short of the declared count. A reader that preallocates from the declared count and never
Measurements
Five calibration points with the nominal value, the measured value, the signed error and the expanded uncertainty at k=2 with its confidence level stated. It is a synthetic illustration of the layout, not an accredited c
Numeric Edges
Eight arithmetic expressions where binary floating point and exact decimal disagree, with both answers and the signed error side by side. Adding one cent a hundred times does not give one, and this file says by exactly h
P8 Convert
CSV reference listing the four expected HDF5 datasets with shapes and units for lightweight converter assertions. Stable P8 artifact p8-convert-hdf5-summary-csv.
Arrays
A 300-field structured array whose descriptor is too long for a version 1.0 header, forcing format version 2.0 and its four-byte header-length field. A hand-rolled parser that assumes the two-byte 1.0 field mis-locates t
Bioinformatics
The same four contigs written one sequence per line rather than wrapped, which is how many pipelines emit FASTA and how many line-oriented parsers assume it always looks. Comparing against the wrapped twin proves a parse
Chemistry
A CIF built entirely out of the constructs that break naive parsers: quoted values containing apostrophes and hashes, a semicolon-delimited multi-line text field, the distinct '?' and '.' markers, a standard uncertainty
Fits
Integer FITS images mark undefined pixels with the BLANK keyword, and BLANK is compared against the stored value before BZERO and BSCALE are applied. Scale first and the four undefined pixels turn into a perfectly plausi
Gridded
An intentionally corrupt NetCDF file, cut to its first 512 bytes so the magic number and part of the header survive but the variable table and every data value do not. It is the fixture for the failure path where format
Hdf5
A compound-dtype dataset mixing an integer key, two float measurements, a fixed-width byte string and a boolean flag in a single record. It is the fixture for readers that must map an HDF5 record type onto a native struc
Imaging
An intentionally corrupt DICOM-shaped file whose header, meta group and every non-pixel element are valid, and whose PixelData element declares a length the file does not contain. A viewer must report the short read rath
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