diff --git a/stim/envi/envi.h b/stim/envi/envi.h
index ac16ea9..5fd0cb1 100644
--- a/stim/envi/envi.h
+++ b/stim/envi/envi.h
@@ -69,6 +69,14 @@ public:
 		file = NULL;				//set the file pointer to NULL
 	}
 
+	envi(std::string filename, std::string headername){
+		header.load(headername);
+
+		fname = filename;					//save the filename
+
+		allocate();
+	}
+
 	
 
 	void* malloc_spectrum(){
diff --git a/stim/parser/filename.h b/stim/parser/filename.h
index 0188f92..0f9bfd5 100644
--- a/stim/parser/filename.h
+++ b/stim/parser/filename.h
@@ -221,6 +221,13 @@ public:
 		return ss.str();
 	}
 
+	//return a string for the filename without an extension
+	std::string str_noext(){
+		std::stringstream ss;
+		ss<<filepath::str()<<_prefix;
+		return ss.str();
+	}
+
 	/// Create a matching file locator with a prefix s
 	stim::filename prefix(std::string s){
 		stim::filename result = *this;
--
libgit2 0.21.4