diff --git a/main.cpp b/main.cpp
index 2876c308..2f274f2d 100644
--- a/main.cpp
+++ b/main.cpp
@@ -117,26 +117,19 @@ PIKbdListener kbd(0, 0, false);
 
 
 int main(int argc, char * argv[]) {
-	//piCout << PISerial::availableDevicesInfo();
-	/*PIIODevice * d = PIIODevice::createFromFullPath(argv[1]);
-	piCout << d;
-	if (d) {
-		d->open();
-		piCout << d->constructFullPath() << d->isOpened();
-	}*/
-	/*piCout << PIString("1.1,0:1").findAny(".,:");
-	piCout << PIString("1,1,0:1").findAny(".,:");
-	piCout << PIString("1:1,0:1").findAny(".,:");
-	piCout << PIString("1.1,0:1").findAnyLast(".,:");*/
-	piCout << versionNormalize("");
-	piCout << versionNormalize("1");
-	piCout << versionNormalize("1.2");
-	piCout << versionNormalize("1.2.3");
-	piCout << versionNormalize("1.2+rc1.99");
-	piCout << versionNormalize("1.2-alpha");
-	piCout << versionNormalize("1..4_rc2-999");
-	//piCout << versionCompare(".2-alpha", "0.2_alpha");
-	//piCout << versionCompare("1_prebeta", "1.0_alpha");
-
+	PIMathMatrixd m = PIMathMatrixd::identity(3,3);
+	m*=33;
+	piCout << m;
+	PIMathMatrixd m2;
+	m2 = m; m2.resize(3,5, 99);
+	piCout << m2;
+	m2 = m; m2.resize(5,3, 88);
+	piCout << m2;
+	m2 = m; m2.resize(4,9, 77);
+	piCout << m2;
+	m2 = m; m2.resize(2,2, 66);
+	piCout << m2;
+	m2 = m; m2.resize(2,8, 66);
+	piCout << m2;
 	return 0;
 }
diff --git a/src_main/containers/pivector2d.h b/src_main/containers/pivector2d.h
index 50119326..fc8fd467 100644
--- a/src_main/containers/pivector2d.h
+++ b/src_main/containers/pivector2d.h
@@ -213,9 +213,24 @@ public:
 	}
 
 	inline PIVector2D<T> & resize(size_t rows, size_t cols, const T & f = T()) {
+		mat.resize(rows*cols_, f);
 		rows_ = rows;
-		cols_ = cols;
+		int cs = (cols - cols_);
+		if (cs < 0) {
+			for (size_t r=0; r<rows; ++r) {
+				mat.remove(r*cols_ + cols_, -cs);
+			}
+		}
 		mat.resize(rows*cols, f);
+		if (!mat.isEmpty()) {
+			if (cs > 0) {
+				for (size_t r=0; r<rows_; ++r) {
+					for (int i=0; i<cs; ++i)
+						mat.insert(r*cols + cols_, mat.take_back());
+				}
+			}
+		}
+		cols_ = cols;
 		return *this;
 	}