Invalid cell array of time series. Cell array arguments must be cell vectors of time series objects. The second attribute of addts must be either an array or a time series object. The time series name must be a character vector or a string. The names of time series you are trying to add must be unique (after conversion to MATLAB variable names using matlab.lang.makeValidName) The name of the time series you are trying to add (after conversion to a MATLAB variable name using matlab.lang.makeValidName) conflicts with the name of an existing member. Data is not compatible with tscollection length