diff --git a/README.md b/README.md
index aff6a29..13f73dd 100644
--- a/README.md
+++ b/README.md
@@ -106,7 +106,7 @@ com.github.clojure-finance/clojask {:mvn/version "1.2.1"}
 6. Output the resultant dataset to "result.csv" (Use 8 threads)
 
    ```clojure
-   (ck/compute df 8 "result.csv" :select ["Employee"	"EmployeeName"	"Department"	"newSalary"	"UpdateDate"])
+   (ck/compute df 8 "result.csv" :select ["Employee"	"EmployeeName" "Department"	"NewSalary"	"UpdateDate"])
    ```
 
    See [`compute`](https://clojure-finance.github.io/clojask-website/posts-output/API/#compute)
diff --git a/src/main/clojure/clojask/dataframe.clj b/src/main/clojure/clojask/dataframe.clj
index feed337..fd10cba 100644
--- a/src/main/clojure/clojask/dataframe.clj
+++ b/src/main/clojure/clojask/dataframe.clj
@@ -48,7 +48,6 @@
   (sort [a b] "sort the dataframe based on columns")
   (addFormatter [a b] "format the column as the last step of the computation")
   (preview [sample-size output-size format] "quickly return a vector of maps about the resultant dataframe")
-  (final [] "prepare the dataframe for computation")
   (previewDF [] "preview function used for error predetection")
   (errorPredetect [msg] "prints exception with msg if error is detected in preview")
   )
@@ -248,11 +247,6 @@
           (throw (Clojask_TypeException. "Input includes non-existent column name(s).")))
     (.setFormatter col-info format col))
 
-  (final
-    [this]
-    (doseq [tmp (.getFormatter (:col-info this))]
-      (.operate this (nth tmp 1) (get (.getIndexKey col-info) (nth tmp 0)))))
-
   (preview
     [this sample-size return-size format]
     (cond (not (and (integer? sample-size) (integer? return-size)))
@@ -277,7 +271,6 @@
       (assert (or (= (count select) (count index)) (= select [nil]))(Clojask_OperationException. "Must select existing columns. You may check it using"))
       (if (<= num-worker 8)
         (do
-          ;; (.final this)
           (if (= ifheader nil) (.printCol this output-dir index))
           (let [res (start-onyx num-worker batch-size this output-dir exception order index melt)]
             (if (= res "success")