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| ===Purpose===
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| Convert data columns based on matching a reference column to a target vector.
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| ===Synopsis===
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| :aligned = batchalign(data,ref_column,target,options)
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| ===Description===
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| Stretch or contract data columns based on a '''target''' using given '''method'''. Savgol options can be used to exaggerate transitions in data prior to cow.
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| ====Inputs====
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| * '''data''' = (nsample, nvar) dataset or double array containing data columns to align.
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| * '''ref_column''' = scalar indicating the column # of data that we are going to match OR ref_vector which is a vector to use in match.
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| * '''target''' = (nsample, 1) vector or dataset to which we are trying to match the ref_column or ref_vector.
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| ====Outputs====
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| * '''aligned''': dataset or double array (depending on input data type) containing the aligned data. If it is a dataset of different number of rows from input then the class, axisscale and labels are set according to the closest row in input dataset.
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| ===Options===
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| ''options'' = a structure array with the following fields:
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| * '''method''': [ 'linear' | {'cow'} | 'padwithnan' ] Alignment method.
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| ** 'linear' means the data columns are extented/contracted using linear interpolation to have the same number of data points as the target vector.
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| ** 'cow' applies Correlation Optimized Warping to match the reference column to the target vector, then apply the same transformation to the other columns.
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| ** 'padwithnan' uses NaN values to extend columns, or truncates columns, to have the same number of data points as the target vector.
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| * '''savgolwidth''': Number of points in savgol filter.
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| * '''savgolorder''': Order of savgol polynomial.
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| * '''savgolderiv''': [0,1,2...] Order of derivative to take of target and ref_column before doing alignment (default = 0).
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| [[cow|Cow]] only options.
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| * '''cow.segments ''': number of segments.
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| * '''cow.slack''': max range of warping.
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| * '''cow.plots''': Governs plotting with COW (0 = no plots).
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| * '''cow.correlationpower''': correlation power.
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| * '''cow.forceequalsegs''': Force equal segment lengths in "xt" and "xP".
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| * '''cow.fixmaxcorrection''': Fix maximum correction.
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| ===See Also===
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| [[alignmat]], [[batchfold]], [[cow]], [[matchrows]]
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