# seqDS a serverside assign function called by ds.seq assign function seqDS called by ds.seq ```r seqDS( FROM.value.char, TO.value.char, BY.value.char, LENGTH.OUT.value.char, ALONG.WITH.name ) ``` ## Arguments - `FROM.value.char`: the starting value for the sequence expressed as an integer or real number with a decimal point but in character form. Fully specified by argument of `ds.seq`. - `TO.value.char`: the terminal value for the sequence expressed as an integer or real number with a decimal point but in character form. Fully specified by argument of `ds.seq`. - `BY.value.char`: the value to increment each step in the sequence expressed as an integer or real number with a decimal point but in character form. Fully specified by argument of `ds.seq`. - `LENGTH.OUT.value.char`: length of the sequence at which point its extension should be stopped, expressed as an integer or real number with a decimal point but in character form. Fully specified by argument of `ds.seq`. - `ALONG.WITH.name`: For convenience, rather than specifying a value for LENGTH.OUT it can often be better to specify a variable name as the argument. Fully specified by argument of `ds.seq`. ## Returns the object specified by the argument of `ds.seq` (or its default name newObj) which is written to the serverside. As well as writing the output object as on the serverside, two validity messages are returned indicating whether has been created in each data source and if so whether it is in a valid form. If its form is not valid in at least one study - e.g. because a disclosure trap was tripped and creation of the full output object was blocked - `ds.seq()` also returns any studysideMessages that can explain the error in creating the full output object. As well as appearing on the screen at run time,if you wish to see the relevant studysideMessages at a later date you can use the `ds.message` function. If you type ds.message("") it will print out the relevant studysideMessage from any datasource in which there was an error in creating and a studysideMessage was saved. If there was no error and was created without problems no studysideMessage will have been saved and ds.message("") will return the message: "ALL OK: there are no studysideMessage(s) on this datasource". ## Details An assign function that uses the native R function seq() to create any one of a flexible range of sequence vectors that can then be used to help manage and analyse data. As it is an assign function the resultant vector is written as a new object into all of the specified data source servers. Please see "details" for `ds.seq` for more information about allowable combinations of arguments etc. ## Author(s) Paul Burton for DataSHIELD Development Team, 17/9/2019

seqDS function