ml: added model print function to linear regression and multiple regression

Author: Adwaith-Rajesh

include/ml/linregress.h

@@ -55,6 +55,13 @@ Score/test the linear regression model based on known x and y values
 */
 double linregress_score(LinearRegressionModel *model, double *x_test, double *y_test, size_t len);
 
+/*
+Display the model details
+
+fmt - the format string used to print the double values
+*/
+void linregress_print(LinearRegressionModel *model);
+
 LinearRegressionModel *linregress_fit_mat(LinearRegressionModel *model, Mat *X, Mat *Y);
 
 double linregress_score_mat(LinearRegressionModel *model, Mat *x_test, Mat *y_test);

include/ml/multiregress.h

@@ -55,8 +55,10 @@ Predict new values with the multiple regression model
 double mlinregress_predict(MLinearRegressionModel *model, double *x_vals, size_t len);
 
 /*
-Score/test the multiple linear regression model based on known x and y values
+Display the model details
+
+fmt - the format string used to print the double values
 */
-// TODO: score the model
+void mlinregress_print(MLinearRegressionModel *model);
 
 #endif

src/ml/linregress.c

@@ -81,3 +81,7 @@ double linregress_score_mat(LinearRegressionModel *model, Mat *x_test, Mat *y_te
 
     return linregress_score(model, x_test->mat->data, y_test->mat->data, x_test->rows);
 }
+
+void linregress_print(LinearRegressionModel *model) {
+    printf("LinearRegressionModel(slope: %.7lf, intercept: %.7lf, rvalue: %.7lf)\n", model->slope, model->intercept, model->rvalue);
+}

src/ml/multiregress.c

@@ -87,4 +87,8 @@ double mlinregress_predict(MLinearRegressionModel *model, double *x_vals, size_t
     return pred_val;
 }
 
-// TODO: Score the model
+void mlinregress_print(MLinearRegressionModel *model) {
+    printf("MLinearRegressionModel(intercept: %lf, coefs: %p)\n", model->intercept, model->coefs);
+    printf("coefs\n");
+    mat_printp(model->coefs, 7);
+}