ds.asMatrix | R Documentation |
Coerces an R object into a matrix. This converts all columns into character class.
ds.asMatrix(x.name = NULL, newobj = NULL, datasources = NULL)
x.name |
a character string providing the name of the input object to be coerced to a matrix. |
newobj |
a character string that provides the name for the output object
that is stored on the data servers. Default |
datasources |
a list of |
This function is based on the native R function as.matrix
.
If this function is applied to a data frame, all columns are converted into a character class.
If you wish to convert a data frame to a matrix but maintain all data columns in their
original class you should use the function ds.asDataMatrix
.
Server function called: asMatrixDS
ds.asMatrix
returns the object converted into a matrix
that is written to the server-side. Also, two validity messages are returned
to the client-side indicating the name of the newobj
which
has been created in each data source and if it is in a valid form.
DataSHIELD Development Team
## Not run:
## Version 6, for version 5 see the Wiki
# connecting to the Opal servers
require('DSI')
require('DSOpal')
require('dsBaseClient')
builder <- DSI::newDSLoginBuilder()
builder$append(server = "study1",
url = "http://192.168.56.100:8080/",
user = "administrator", password = "datashield_test&",
table = "CNSIM.CNSIM1", driver = "OpalDriver")
builder$append(server = "study2",
url = "http://192.168.56.100:8080/",
user = "administrator", password = "datashield_test&",
table = "CNSIM.CNSIM2", driver = "OpalDriver")
builder$append(server = "study3",
url = "http://192.168.56.100:8080/",
user = "administrator", password = "datashield_test&",
table = "CNSIM.CNSIM3", driver = "OpalDriver")
logindata <- builder$build()
connections <- DSI::datashield.login(logins = logindata, assign = TRUE, symbol = "D")
# Converting the R object into a matrix
ds.asMatrix(x.name = "D",
newobj = "mat.obj",
datasources = connections[1]) #only the first Opal server is used ("study1")
# Clear the Datashield R sessions and logout
datashield.logout(connections)
## End(Not run)
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