The phrase "a set of columns" is correct and usable in written English.
It can be used when referring to multiple vertical divisions in a table, spreadsheet, or architectural design.
Example: "The report was organized into a set of columns to clearly present the data."
Alternatives: "a collection of columns" or "a group of columns".
We design an exact simultaneous column-and-row generation algorithm whose novel element is a row-generating subproblem that generates a set of columns and rows.
The table file, if it exists, consists of a set of columns with a single text header on the first line for each column and then one entry per time point for each column.
The output consists of a set of columns containing the far-field points' index (integer), angle (radians), followed by the squared magnitude of each of the six fields (Ex, Ey, Ez, Hx, Hy, Hz).
A set of columns in the SMB represent one step in the chromatographic cycle i.e. there will be one set each of columns for load, wash, elution etc within the SMB.
The output consists of a set of columns
The output consists of a set of columns
We then completed a set of column experiments to test the predictive capability of the reactive transport model.
The optimal distillation column, or column sequence, is obtained by selecting, for each column section, among a set of column sections with different number of theoretical trays.
The statistical-regression model (SRM) is based on measurement of a set of column holes cut in a plan-parallel brass plate according to Box-Behnken design.
A set of column tests were carried out to evaluate the tortuosity, mechanical dispersion and retardation factor regarding lead transport in SB and LSB vertical engineered barrier.
A set of column experiments was conducted to investigate the chemical and physical heterogeneity effect on colloid facilitated transport under slow pore velocity conditions.
