3.3.2.7 Create

Create-cmd

Creates a dataset or worksheet of name with the number of rows numRows. NumRows should be the maximum number of rows you anticipate requiring. Each dataset is associated with values and attributes. To change the values and attributes of a dataset, use the set command. To view the worksheet for a dataset, use the edit dataset command.

Please see the newbook X-Function.

Syntax:

creat  name [option] [numRows]

Options:

-c;Create a Y dataset and associated X dataset containing all zero values

Syntax: create name -c numRows

Create a Y dataset and associated X dataset containing all zero values. To plot this data you must specify values for both X and Y. The Y dataset is called name. The X dataset is called name_A. Note:If name contains an underscore " _ ", it and subsequent characters are ignored when naming the X dataset. So, if name is data1_test, X is called data1_A.

-cd;Create a Y dataset and associated X dataset containing all zero values and allow destruction of dataset

Syntax: create name -cd numRows

Like the -c option but -cd causes destruction of the dataset when all existing plots of the dataset are destroyed. This will apply to child window destruction, to OriginC's Destroy() method of the page, and when using the LabTalk win -c command.

create test_b -cd 10;
test_a=data(1,1000);
test_b=normal(1000);
win -t plot;
layer -i test_b;

Loose dataset destruction can be disabled by setting the value of @DLDG to 0:

-d;Create a dataset and an associated X dataset named name_A

Syntax: create name -d numRows

Create a dataset and an associated X dataset named name_A. Plot the datasets into the active graph layer as a scatter data plot.

-dd;Create a dataset and an associated X dataset named name_A and allow destruction of dataset

Syntax: create name -dd numRows

Like the -d option but -dd causes destruction of the dataset when all existing plots of the dataset are destroyed. This will apply to child window destruction, to OriginC's Destroy() method of the page, and when using the LabTalk win -c command.

Loose dataset destruction can be disabled by setting the value of @DLDG to 0:

-f;Create a function

Syntax: create name -f npts formula

Create a function. While you can use this notation to create a function, a simpler method is: myFunc(x)=3+3*sin(x);

For example, you can run the following script to create a function called myquad using the formula , generate 200 data points, then plot the function as a line.

create myquad -f 200 "x^2";
plotxy myquad 200;
//Rescale the X and Y axis
sec -p 1;
layer -a;

Note: the npts takes input integer value no less than 100 as the dataset size.

-fp;Create a loose dataset for 2D parametric function plot

Syntax: create name -fp npts formula min max

npts is the number of points of the loose dataset, formula must use the variable t as the independent, min and max are the minimum and maximum of the loose dataset respectively. After creating the loose dataset, the X-Function plotxy can be used to make 2D parametric function plot.

create mydata -fp 50 "t*cos(t)" 0 "2*pi";
plotxy mydata 201;

-fp2;Create a 2D loose datasets for 3D parametric function plot

Syntax: create name -fp2 npts formula min max npts2 min2 max2

npts is the number of points of the first dimension (number of columns, independent u), formula must use the variables u and v as the independents, min and max are the minimum and maximum of the first dimension values respectively. npts2, min2 and max2 will be the similar meanings to the first dimension for the second dimension (number of rows, independent v). After creating the 2D loose dataset, the X-Function plotm can be used to make 3D parametric function plot.

create myz -fp2 20 "(v*v*cos(u)*cos(u)+v*v*sin(u)*sin(u))/2" 0 "2*pi" 50 0 5;
plotm myz 103;

-m;Create a dataset associated with a double-headed vertical arrow as the data point symbol type

Syntax: create name -m numRows

Create a dataset associated with a double-headed vertical arrow as the data point symbol type. Otherwise, same as -c above.

-mfp;Create matrices from 2D loose datasets for 3D parametric function plot

Syntax: create name -mfp ZData XData YData "XVar,YVar"

A matrixbook with the specified name (if exists, enumerated) will be created, with 3 matrix objects in the matrix sheet. 3 matrix objects will be with the data from the specified 2D loose datasets, ZData, XData, and YData respectively. The 2D loose dataset can be created by using create -fp2 command. XVar and YVar will be used as the two independent variable name. The X-Function plotm can be used to make 3D parametric function plot from the created matrices.

create myx -fp2 20 v*cos(u) 0 6.28 50 0 5;
create myy -fp2 20 v*sin(u) 0 6.28 50 0 5;
create myz -fp2 20 (v*v*cos(u)*cos(u)+v*v*sin(u)*sin(u))/2 0 6.28 50 0 5;
create Func -mfp myz myx myy "u,v";
plotm im:=[Func]1!1 plot:=103 x:=2 y:=3;

-mfph; Create a hidden matrix from 2D loose datasets for 3D parametric function plots

Syntax: create name -mfph ZData XData YData "XVar,YVar"

A matrixbook with the specified name (if exists, enumerated) will be created as a hidden window. The matrixsheet will contain with 3 matrix objects, and those objects will contain the data from the specified 2D loose datasets, ZData, XData, and YData, respectively. The 2D loose datasets can be created by using the create -fp2 command. XVar and YVar will be used as the two independent variable names. The X-Function plotm can be used to make 3D parametric function plots from the created matrices.

For an example, see plot 3D box and sphere using plotm.

-n;Create an empty Y dataset with no associated X values

Syntax: create name -n numRows

Create an empty Y dataset with no associated X values. When plotting, assume an initial X value of 1 and an increment of 1.Use the set command to change these X attributes. To view the dataset, use the edit datasetname command.

-nd;Create an empty Y dataset with no associated X values and allow destruction of dataset

Syntax: create name -nd numRows

Like the -n option but -nd causes destruction of the dataset when all existing plots of the dataset are destroyed. This will apply to child window destruction, to OriginC's Destroy() method of the page, and when using the LabTalk win -c command.

Loose dataset destruction can be disabled by setting the value of @DLDG to 0.

-nrs;Create a virtual dataset via a named range

Minimum Version: 9.1 SR0

Syntax: create name -nrs extract_rule [range_string, designation, scope_range_string]

This command creates a virtual dataset by specifying the name of a range. The values of the virtual dataset are determined by the extract rules listed below:

Optionally, you can specify the range_string to refer to a selected range. If not specified, the current selection will be used. You may also specify scope_range_string to refer a worksheet to be used. If not specified, the worksheet in the first range of poly range will be used.

The following example creates the first row in Book1 Sheet1 as myvsx and second row as myvsy, and use these two dataset for X and Y, respectively, for plotting:

create myvsx -nrs 1 "[Book1]Sheet1![1]:[1]";
create myvsy -nrs 1 "[Book1]Sheet1![2]:[2]";
plotxy (myvsx, myvsy);

Another example is to create myvsbox with the block of cells from cell at column 1 row 2 to the cell at column 3 row 4:

create myvsbox -nrs 1 "[Book1]Sheet1!1[2]:3[4]";
win -t p box;
layer -i206 myvsbox;

-s;Create a string dataset

Syntax: create name -s numRows

Create a string dataset.

See Also: dataset -a

-t;Create a dataset that is not associated with a worksheet and that cannot be plotted

Syntax: create name -t numRows

Create a dataset that is not associated with a worksheet and that cannot be plotted.

-vsshdf;Create virtual dataset with existing ShDF

Syntax: create name -vsshdf worksheetrange uidShDF;

The string worksheetrange specify the worksheet columns on which the virtual dataset name is based and uidShD is the UID of the existing ShDF(Shared Data Filter).

fname$ = System.path.program$ + "Samples\Statistics\automobile.dat";
newbook;
impASC;
worksheet -shdf uidShDF [[D:3:"between(16,23)"]]; //Define a Shared Data Filter
create myshdfvsy -vsshdf col(F) uidShDF; //Create virtual datasets using existing ShDF
plotxy iy:=(C,myshdfvsy) plot:=202;

-w;Specify column names after numRows

Syntax: create name -w numRows [colName(s)]

You can specify column names after numRows. If you specify column names, you must specify at least two. Use the Window command to open a worksheet created from a specific template.

-wd;Create Text & Numeric datasets but not worksheet

Syntax: create name -wd numRows [colName(s)]

Create the datasets but not the worksheet. Format datasets as Text & Numeric.

-wdn;Create Numeric datasets but not worksheet

Syntax: create name -wdn numRows [colNume(s)]

Create the datasets but not the worksheet. Format datasets as Numeric.

The following example create some loose datasets and use X-Function to compute histogram from col(2) of active sheet and make a plot.

create histgm -wdn 10 bincenter counts;
freqcounts irng:=col(2) rd:=tmptr;
histgm_bincenter=tmptr.FreqCount.BinCenter;
histgm_counts   =tmptr.FreqCount.Counts;
plotxy (histgm_bincenter, histgm_counts) p:=203;

-wh;Create a hidden worksheet

Syntax: create name -wh numRows[colNume(s)]

Create a hidden worksheet. Format datasets as Text & Numeric. To view the worksheet, use the edit datasetname command.

-whn;Create a hidden worksheet with the datasets set to Numeric

Syntax: create name -whn numRows[colName(s)]

Create a hidden worksheet with the datasets set to Numeric. To view the worksheet, use the edit datasetname command.

create tmpbook -whn 10 aa bb;

-wn;Create a worksheet with the datasets set to Numeric

Syntax: create name -wn numRows[colName(s)]

Create a worksheet with the datasets set to Numeric.

-x;Create a dataset associated with a vertical line as the data point symbol type

Syntax: create name -x numRows

Create a dataset associated with a vertical line as the data point symbol type. Otherwise, same as -c above.

-xd;Create a dataset associated with a vertical line as the data point symbol type and allow destruction of dataset

Syntax: create name -xd numRows

Like the -x option but -xd causes destruction of the dataset when all existing plots of the dataset are destroyed. This will apply to child window destruction, to OriginC's Destroy() method of the page, and when using the LabTalk win -c command.

Loose dataset destruction can be disabled by setting the value of @DLDGto 0:

Examples:

Create X and Y datasets of 100 points in a hidden workbook. Workbook name and Y column name are specified and X column name defaults to A:

// Workbook = '''Exp1''', Y column = '''mVolts'''
create Exp1_mVolts -c 100;

Create various worksheets.

// Visible, four column worksheet named Misc
create Misc -w 11 Alpha Beta Gamma Delta; 
// Hidden (even from Project Explorer), 
//two column worksheet named Hidden1
create Hidden1 -wd 13 A1 A2; 
// Hidden (visible in Project Explorer), 
//three column worksheet named Hidden2
create Hidden2 -wh 23 AAA A2Z ZZZ; 
// Visible, three column (Numeric type) worksheet named Numbers
create Numbers -wn 31 PY1 PY2 PY3;

This script creates a string dataset and demonstrates writing and reading from the dataset.

create mystrings -s 10;
MyStrings[1]$=Hello;
MyStrings[10]$=Goodbye;
for(ii = 1;ii <= 10;ii++) {
      %A=MyStrings[ii]$;
      type $(ii) \x3D %A;
};

Create XY datasets that add themselves to active graph layer. A better approach is also shown.

// Older method requires queueing delay
win -t plot 201 Scatter; // Create a graph
create Plot_Me -d 50;    // Create the worksheet
Plot_A = data(1,50);     // Fill the X column
Plot_Me = uniform(50);   // Fill the Y column
queue {
   set %C -e 50;
   layer -a;
}
doc -uw;
// Simpler to use hidden worksheet
win -t plot 201 Scatter;
create Plot -wh 50;
Plot_A = data(1,50);
Plot_B = uniform(50);
layer -i Plot_B;
layer -a;

Create Y data and plot against row index.

create Singular -n 7;
singular = {1,6,2,5,3,0,7};
win -t plot linesymb;
layer -i singular;
layer -a;

Create a temporary dataset with no plot designation.

create Lookup -t 7;
Lookup = {-1,1,1,1,1,1,-1};
loop(ii,1,7) {
    if(lookup[ii]==1) type Today is a work day.; 
    else type Take the day off.;
}