else if(commandName == "pcoa") { command = new PCACommand(optionString); }
else if(commandName == "otu.hierarchy") { command = new OtuHierarchyCommand(optionString); }
else if(commandName == "set.dir") { command = new SetDirectoryCommand(optionString); }
else if(commandName == "pcoa") { command = new PCACommand(optionString); }
else if(commandName == "otu.hierarchy") { command = new OtuHierarchyCommand(optionString); }
else if(commandName == "set.dir") { command = new SetDirectoryCommand(optionString); }