GRAPH command

Values of all the variables, stored by the PREPARE statement can be plotted at the end of the simulation or after an interrupt, using the GRAPH command. The GRAPH T,A,B,C,D, command, for example, plots a combined post-mortem graph of all the concentrations with respect to the independent variable time... 

Graphical output obtained by the GRAPH command, for the above example is shown in Chapter 5. 

The AGRAPH command is similar to the GRAPH command except the output is produced on the alternative graphics device. 

This series of program statements will plot CA against T on the screen as the simulation progresses. Values of T, CA, CB, CC and RATE will also appear on the screen. Subsequently, any of the variables T, CA, CB, CC and RATE can be plotted against any other variable by using the GRAPH command. 

Building up the structure skeleton is effected by means of the GRAPH command GRA, i.e. it determines whether the structure skeleton consists of chains and/or rings and the length of chains or size of rings (Fig. 104). In addition, it determines the bonds between atoms. The basic commands are ... 

Program THERM solves the dynamic model equations. The initial values of concentration and temperature in the reactor can be changed after each run using the ISIM interactive commands. The plot statement causes a composite phase-plane graph of concentration versus temperature to be drawn. Note that for comparison both programs should be used with the same parameter values. 

An output file can be stored and used for further applications, such as graphing with special graphing software. This done by reading the file as usual and before running the simulation give the command... 

There are several kinds of extensibility built into RS/1. A full structured programming language called RPL is a part of the system. This language, stylistically similar to PL/I, also allows direct access to data objects such as tables and graphs, and allows the intermixture of high-level data management commands with traditional programming constructs. 

Next choose SOLVE from the PROBLEM window. Finally, use the NEW command from the GRAPH menu to create graphical output for the problem or create tabular output for more accurate numerical solutions. 

The command hold on after the first plot command ensures that all plots appear in the same graph. The command hold off at the end of our multiple plottings makes sure that the picture of one solveadiabxy run is not preserved in the figure window and that subsequent solveadiabxy plots for different data are not appended to the earlier plots, but rather drawn by themselves. 

Exercise your command of MATLAB by trying to replicate the three graphs in Figure 3.15. Learn about the subplot, xlabel, ylabel, and title MATLAB commands and how to use them. 

It is advisable to graph and inspect the reaction more closely at the entrance of the reactor. After a few experiments with Vend = 0.1, 0.04, and 0.01, we have set the desired final volume to Vend = 0.01 m3 in Figure 4.4, which is drawn by the MATLAB command fixedbedreactf.003,160,1200,1030,.01,15,0,1) . ... 

In threeCSTR.m, please note the use of the subplot MATLAB command that draws six separate graphs in our code, namely two for each tank. 

The BASIC code can be used within the keyword RATES, but also for USER GRAPH, USER PRINT and USER-PUNCH and always occurs between the commands... 

There are several ways to create new graphs. The simplest is by a plotting command as discussed in the next sections. A new window consisting of a hgure is created. Unless indicated otherwise, each time a graphics command is executed, the graph in the figure window is overwritten. 

It is possible to superimpose several line graphs, for example if X is a matrix with five columns, then the command plot (X) will superimpose five graphs in one picture. 

Points in a graph can be labelled using the text command. The basic syntax is text (A, B, name), where the A and B are arrays with the same number of elements, and it is recommended that name is an array of names or characters likewise with the... 

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