Command Window

Fig. 4.23 Local operation button block available with the Window command...

We will look at a number of graphical utilities in the next few chapters and, believe it or not, the command prompt is one of them. Although you can t tell from looking at it (see Figure 12.20), the crazy thing about the Windows command prompt is that it is actually a 32-bit Windows program that is intentionally designed to have the look and feel of a DOS command line ... 

Beyond the standard Windows commands, ACID menu shortcuts are identified to the right of the specific command. For example, all of the various windows in ACID can be instantly displayed or hidden by using the commands on the View menu or by using the associated keyboard shortcuts. 

This list could be topped by the standard Windows commands Ctrl +Z and Ctrl+Y (Undo and Redo) as well as Ctrl+C (Copy), Ctrl+X (Cut), and Ctrl + V (Paste). Of course holding the Ctrl key (or Shift key) while selecting events allows you to select multiple events. And don t forget the Windows motto— Save early, save often Ctrl+S. 

Shift+FlO or Windows Command key Context Sensihve menu... 

After return to the Commander window, the reaction retrieval may be executed separately 629 Dicls-Aldcr reactions between aliphatic dienes and cyclic dicno-pliiles are found. This partial result can be narrowed down by restricting tlie reaction conditions by means of the fact editor, The search field codes for the yield and the temperature can be found to be RX.NYD and RX.T, respectively, either by browsing the database structure or by applying the Find option, as described in the first example. To ensure that the retrieved reaction conditions belong to the same experiment, both search terms must be connected by means of the PROXIMITY operator. Before the retrieval is started, the option "Refine results in... 

Using MATLAB to design a system, it is possible to superimpose lines of constant ( and ajn on the root locus diagram. It is also possible, using a cursor in the graphics window, to select a point on the locus, and return values for open-loop gain K and closed-loop poles using the command... 

This produces the (pole-zero cancellation) root locus plot shown in Figure 5.18. When run, exampSlO.m allows the user to select the value of K that corresponds to ( = 0.7, and then uses this selected value to plot the step response. The text that appears in the command window is... 

Creates closed-loop Bode Gain Diagrams for K=3.8 and 3.2 %Prints in Command Window Mp,k,wp and bandwidth 0 If... 

The command cloop is used to find the closed-loop transfer function. The command max is used to find the maximum value of 20 logio (mag), i.e. Mp and the frequency at which it occurs i.e. tUp = uj k). A while loop is used to find the —3 dB point and hence bandwidth = ca (n). Thus, in addition to plotting the closed-loop frequency response gain diagrams,/ gd29.7 will print in the command window ... 

Running examp75.m produces command window text... 

The open continuous transfer functions and pulse transfer functions for the plant and compensator are printed in the command window... 

The continuous and discrete closed-loop systems are shown in Figures 7.22(a) and (b). The digital compensator is given in equation (7.128). Script file examp78.m produces the step response of both systems (Figure 7.25) and prints the open and closed-loop continuous and pulse transfer functions in the command window... 

The command augtf augments the plant with the weighting functions as shown in Figure 9.31. The branch command recovers the matrices ap, bp, cp and dp packed in TSS. The hinfopt command produces the following output in the command window... 

After eleven iterations, hinfopt identifies that 7 in equation (9.176) has a best value of 0.13. The command sigma calculates the data for a singular value Bode diagram as shown in Figures 9.32, 9.34 and 9.35. Other information printed in the command window is given below... 

From the File menu, use the New command. An empty untitled window will be displayed. On this window, you can type the model. 

Under Windows, use the built-in search command in your preferred text editor to locate this line if present. 

NBO population analysis 195 NBO program 196 Newman projections 290, 292 NewZMat utility xxxvii Windows xlvi nice command xxxviii nitrobenzene 165 NMR properties 21,29, 53, 104 Nobes 117 Norden 218 normal modes 65 normal termination message xlv nuclear displacements 65 numeric second derivatives 61 Nusair 119... 

Step 2. For MS Windows users, start the CASim software by double clicking CASim.BAT in the CAProgram directory. If you wish, you can bring CASim.BAT to the desktop so that you can start from there. For other platforms, first set CAProgram as the default directory, then you may start the software by entering java CASim at the command line. 

We should make a habit of using the on-line help. The user interface of the help browser, which also works as a Web browser, is extremely intuitive, and it is highly recommended. When we mention the "help" command, that is just a general comment it does not mean that you have to use the old-style help. To use help in the Command Window, turn the page display mode on first. Here s an example of seeking help on the print command with the old-style help ... 

The help features and the Command Window interface tend to evolve quickly. For that reason, we use our Web Support to provide additional hints and tidbits so we can keep you update of the latest MATLAB changes. For now, we will introduce a few more basic commands ... 

MATLAB is most at home dealing with arrays, which we will refer to as matrices and vectors. They are all created by enclosing a set of numbers in brackets, [ ]. First, we define a row vector by entering in the MATLAB Command Window ... 

Save these statements in a file named, say, plotxy.m. Anything after the"%" sign is regarded as a comment, which you do not have to enter if you just want to repeat this exercise. After we have defined or updated the values of x and y in the Command Window, all we need is to enter "piotxy" at the prompt and MATLAB will do the rest. The key is to note that the M-file has no "read" or "input" for x and y. All statements in an M-file are simply executed in the Command Window. 

There is another easy way to "cheat." On UNIX/Linux workstations, open up a new text editor and enter your frequently used statements there. On Windows, you can use the really nice MATLAB Editor. You can copy-and-paste multiple commands back and forth between the text editor window and the MATLAB window easily. If you want to save the commands, you certainly can add comments and annotations. You can consider this text file as a "free-format notebook" without having to launch the Microsoft Word Notebook for MATLAB. 

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