Variable name, changing

In the snail preceedlng example it can be seen that each data set consists of three fields enclosed by square brackets. The first field is the variable name, the second is the value for that variable, and the third is an optional units field. All fields are read as string variables and the value field is changed to a numeric variable when necessary. The order in which the data sets appear is not Important, nor is their position in... 

The next step is to specify Column Options, where the SAS variable name, label, type, length, informat, and format can be changed if the SAS Enterprise Guide defaults are not desired. Also, there is a variable drop field option as well. The following is a sample of that window filled out for the LABNORM file. 

This relationship identifies the surface energy as the increment of the Gibbs free energy per unit change in area at constant temperature, pressure, and number of moles. The path-dependent variable dWs in Eq. (2.60) has been replaced by a state variable, namely, the Gibbs free energy. The energy interpretation of y has been carried to the point where it has been identified with a specific thermodynamic function. As a result, many of the relationships that apply to G also apply to y ... 

We will define an input to the system as a quantitative or qualitative variable (experimental condition) that might have an influence upon the system. We can measure such an influence as a change in one or more output variables named responses. ... 

In the present case, what we would like to do is to copy the variable names present in cells C8 to C14 to the row 16 to 06. To explain how ranges work let us first suppose that we want to copy range C8 - C14 into D24 - D30. First one moves the pointer to the cell from which the range starts (C8). Then one selects the main menu, by pressing / key. The mode indicator changes from READY to menu MODE. Then in the main menu one selects the Copy option. The control panel indicates the content of the cell on which the pointer is and also prompts ... 

The point of this analysis was to characterize the source of inefficiencies in the process as designed. The main heat exchanger was the key item. The authors developed equations which related the area of the heat exchanger and its irreversible entropy change to two controllable design variables namely, the pressure drop, and the hot end temperature driving force between... 

You can use either upper- or lowercase letters. If you change the case of a variable name in the line you are currently typing (e.g., from variablel to Variable 1), VBA will change all instances of the old form of the variable to the new form. 

Duplicate variable names can cause all sorts of problems. You might use a variable called A to hold a value at the beginning of the program, and then inadvertently use the same variable name later on. If the program returns to the beginning, the value has changed. FOR-NEXT loops sometimes lead to duplication. When you re using a variable like A, make sure you don t use it as an index in a FOR-NEXT loop. And remember, only the first two characters of a variable count the computer thinks ALT is the same variable name as ALIEN. 

The influence of one other variable, namely, the temperature, remains to be considered. It is not an easy matter to vary the temperature without changing the dielectric constant, and so these factors are taken together. From equation (40.11) it is evident that the limiting Debye-Hiickel slope should vary as l/CDT) , where T is the absolute temperature at which the activity coefiSicients are measured. The experimental results obtained under a wide variety of conditions, e.g., from liquid ammonia at — 75 C to water at the normal boiling point, 100 C, are generally in satisfactory agreement... 

Step 1 Open FEMLAB and choose Chemical Engineering, ID, Mass Transfer, Diffusion. The variable c is a stand-in for velocity, v. (You can change the variable name if desired.)... 

Step 1 Choose the Navier-Stokes equation under the Multiphysics/Model Navigator option. Then choose Physics/Subdomain Settings. Select the domain and type in the formula for viscosity 1 -I- c. If you have several concentration variables, be sure to use the variable names assigned by FEMLAB (or changed by you) in this formula. 

If we allow some process to take place, then the energies of the subsystems [/, U" may change as the extensive variables are changing. However, the total energy remains constant, if the compound system, made up from both subsystems under discussion, is isolated. We discuss now qualitatively some processes, namely the subsystems being connected via a... 

For example, a process flow sheet can easily be constructed in Excel as follows in the sheet Elow sheet draw a flow sheet by using the drawing toolbar. Any information concem-ing process conditions can be inserted in cells near the desired point of the flow sheet Eor each piece of information there need to be three cells, one for the variable name, one for the variable value, and one for the variable units. That is, to insert a stream flow rate, select a cell near the icon of the stream arrow and insert the symbolic name of the stream flow rate, i.e., F =, in a neighboring cell insert the formula = F to get the value from the Process sheet, and in another cell, nearby, insert the units, i.e., kg/s. You can add any information you like. Any changes in data are updated immediately. 

A spatial oscillator works on the same principle Energy is distributed in space either among localized entities or among localized energies-per-entity, but not both on the same location. The model of a spatial oscillator is completely similar to that of the tanporal oscillator, only the names of the variables are changed. For this reason, all reasoning will be made for the temporal oscillator. 

The possibility of a rescaling of the representative freely jointed chain, as formulated by these equations, expresses an important basic property of ideal polymer chains, namely their self-similarity . Self-similarity here means that independent of the chosen length scale, i.e. the resolution, an ideal chain always exhibits the same internal structure, one for which all internal distance vectors are distributed like Gaussian variables. A change of the length scale leaves this structure s characteristics invariant. 

Combination keystroke < Shift>+ + allows us to insert variable names first, the symbols prohibited from using in traditional programming (blank, dash, comma, etc.), and, secondly, symbols fixed for some operators in Mathcad (, , etc.). After pressing this combination, the color of pointer changes from blue to... 

In Mathcad Prime, a user can enter special symbols into a variable name in such a way. At first, enter a variable, for example, amount of substance, mole, as shown in Fig. 6.48. Then insert the variable into a Text Box where it will be noted as LABLE Unit mole. This notation requires correction entering/L in the end of the note. After that, insert the changed notation into the worksheet as the name of the variable mole/L. 

In the Workspace browser, the second type of MATLAB sub-window, you will notice that MATLAB shows a variable name called my ans with a value of 42 and is separate from that of ans, which keeps changing as a result of successive mathematical operations. 

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