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Functions of esProc/R/Python/Perl in Structured Data Process by Comparison:Chapter 8. 2D Table Summary

  esProc     =[1,2,3].sum()                                       // Evaluate the sum for the Sequences     =tbl.sum(col1)                                      // Evaluate the sum for col1 fields in Table sequence tbl     =tbl.select(col2>30).sum(col1)        // Evaluate the sum for the record field col1 for which the col2>30 is true in Table sequence tbl     =tbl.sum(#3)                                         // Evaluate the sum […]

Thinking of Set in esProc

1.Sequence and Set in esProc Unlike traditional programming languages, esProc employs set commonly. In fact, the sequence in esProc belongs to the field of set. So it’s quite important to deeply understand the concept of sets when using esProc. Like an integer and a string, the set is a basic data type; it could be […]

esProc Helps to Analyze Stock Bullish Trend

Here, we use esProcto analyze stock bullishtrend. There is a variety of specific algorithms, from which, onewill be illustrated the whole process in detail. Other cases can be solved in the similar codes. Specific requirements are: Among the stocks which have kept going up for N days, what is the proportion of those that continue […]

Basic Data Type in Data Processing Programing Language

Programming languages focus on various basic data types, subject to their different design goals. Languages such as Java and C# are designed to develop the common applications. Their basic data types are character strings, number, boolean, and other atomic data type, array and common object. SQL, PowerBuilder, R, esProc, and other alike languages are designed […]

esProc Oracle Single Machine Performance Comparison Test Report(IV)

7 Analysis From all use case test we could generally reach the following conclusion on the data characteristics: 1.Oracle normally performs better than esProc with small data volume concurrent computation; sometimes the performance advantage could be as high as several times. But there are exceptions. esProc performs better than Oracle in join computation. 2.For large […]

Functions of esProc/R/Python/Perl in Structured Data Process by Comparison:Chapter 7. Inserting, Adding and Removing Column

  esProc tbl.derive(col1)         // Add a column col1 to the Table sequence esProc is unable to execute some operations such as deleting the column from the existing Table sequence or inserting the column into the existing Table sequence, however, it is very easy to create a new Table sequence. In fact, the action for creating […]

esProc Oracle Single Machine Performance Comparison Test Report(III)

6 Test Use Case 6.1 Small Data Volume Concurrent Scan This use case tests Oracle and esProc for scanning performance against small data volume tables (files).It’s done with a multi-task concurrent access mode.Each task is accessing different table (file). Among them, Oracle is running 16 parallel processes, while esProc is running 4 in parallel. Tests […]

esProc Oracle Single Machine Performance Comparison Test Report(II)

5 Use Cases Description For better understanding, all test logic will be described in SQL. During the test Oracle will execute the SQL statement directly, whereas esProc will be running the equivalent code we write to complete the same computation. 5.1 Use Case for Large Data Volume Scan This use case is large task single […]

esProc Oracle Single Machine Performance Comparison Test Report(I)

1.Testing purposes Testing esProc and Oracle on the same hardware for single machine performance, to compare the two for performance difference either in large data volume single task computation or small volume multiple tasks concurrent computation use cases. 2.Testing contents and methods Data volume:   Small data volume: single fact table around 10 G. To avoid […]

Functions of esProc/R/Python/Perl in Structured Data Process by Comparison:Chapter 6.Modifying Field Value

esProc tbl.modify(2,col1*5:col1,col2+3:col2)       //field value col1 recorded in Row 2 of Table Sequence tbl is changed to col1*5, and field value col2 to col2+3 tbl.modify(2:5,col1*5:col1,col2+3:col2)          //Subsequent 5 Rows are modified from Row 2 in a consecutive way //Modify the two Table sequences in the same dimension synchronously A1=db.query(“select id,name,salary from salary order by id”) A2=db.query(“select id,bonus […]

Preparing Testing Data with esProc

Testing data preparation is a critical work in software testing. High-quality testing data can better simulate the business case. It helps to meet the testing requirements by timely and effective evaluation of softwareperformance, or finding potential issues in the software builds. Most oftime, the amount of data used in testing is relatively large, and the […]

A Data Analytic Language with Feature of Parallel Data Processing

esProc is a data analysis language, featuring the easy-to-code, strong interactivity, dedicated debugging, and agile and arbitrary syntax. In particular, esProc is also capable of performing the parallel computation and fit for the big data analysis. For example,a commercial Website generates several thousands of access logs daily. To analyze the user behaviors based on these […]

Functions of esProc/R/Python/Perl in Structured Data Process by Comparison:Chapter 5.Obtaining Field Value

  esProc     =tbl.(colname)          //Return the values of a column in the table, which can be accessed by Column name     =tbl.(#4)                     //The values of a column can be accessed by Column number     =tbl(4).colname        //Return the values of Column colname of Row 4 in the table, which can be accessed by […]

Functions of esProc/R/Python/Perl in Structured Data Process by Comparison:Chapter 4.2D Table Structure

esProc esProc has existing table sequence object, innate column name and number as well as row number, and also provides a wealth of access methods, aggregate functions and loop functions. The syntaxes are all identical, regardless of table sequence, record object itself or pointer reference. The system will perform auto-process function in the case of […]

Vector Computing Comparison: R Language vs. esProc

One of the most attractive features of R language and esProc is that their codes are both of the agile style, only requiring few lines of codes to implement plentiful functions. For example, both of them allow for composing Vector Computing expression, simplify the judgment statements, extend the basic functions to the advanced ones, and […]

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