Prism User's Guide - CSAIL People - MIT

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80 where (a .eq. maxval(a)) print a Prism User f Guide prints the element of a that has the largest value. (Ihis is equivalent to the mAX- LOC intrinsic function.) See Section 2.9 for more information on writing expressions in Prism. Note that setting the context affects only the rinting or displavine of the vari- _ ___ -- w -- - -able. It does not affect the actual context of the program as it executes. 5.3 Working with Visualizers The window that contains the data being printed or displayed is called a visualizer. Figure 19 shows a visualizer for a 3-dimensional array. menus-- display window Z31 Zz 223 224 225 231 232 233 234 235 241 242 243 244 245 251 252 253 254 255 261 262 263 264 265 A 272 273 274 275 282 283 284 285 291 292 293 294 295 301 302 303 304 305 311 312 313 314 315 321 322 323 324 325 331 332 333 334 335 341 342 343 344 345 351 352 353 354 355 361 362 363 364 365 371 372. 373 374 375 381 382 383 384 385 391 392 393 394 395 401 402 403 404 405 Figme 19. A visualize for a 3-dimensional array. ~ data navigator The visualizer consists of two parts: the data navigator and the display window. There are also File and Options pulldown menus. The data navigator shows which portion of the data is being displayed, and provides a quick method for moving through the data. The data navigator looks different depending on the number of dimensions in the data. It is described in more detail in Section 5.3.1. Version 1.2, March 1993 Copyright C 1993 Thinking Machines Corporation I i l I i,
1. 4· Chapter 5. Vinalizing Data 81 The display window is the main part of the visualizer. It shows the data, using a representation that you can choose from the Options menu. The default is text: that is, the data is displayed as numbers or characters. Figure 19 is a text visualizer. The display window is described in more detail in Section 5.3.2. The File menu lets you save, update, or cancel the visualizer, see Section 5.3.3 for more information. The Ontions menu. among other things. lets you change the way values are represented; see Section 5.3.4. 5.3.1 Using the Data Navigator in a Visualizer The data navigator helps you move through the data being visualized. It has different appearances, depending on the number of dimensions in your data. If your data is a single scalar value, there is no data navigator. For 1-dimensional arrays and parallel variables, the data navigator is the scroll bar to the right of the data. The number to the right of the buttons for the File and Options menus indicates the coordinate of the first element that is displayed. The elevator in the scroll bar indicates the position of the displayed data relative to the entire data set. For 2-dimensional data, the data navigator is a rectangle in the shape of the data, with the axes numbered. The white box inside the rectangle indicates the position of the displayed data relative to the entire data set. You can either drag the box or click at a spot in the rectangle. The box moves to that spot, and the data displayed in the display window changes. For 3-dimensional data, the data navigator consists of a rectangle and a slider, each of which you can operate independently. The value to the right of the slider indicates the coordinate of the third dimension. Changing the position of the bar along the slider changes which 2-dimensional plane is displayed out of the 3-dimensional data. For data with more than three dimensions, the data navigator adds a slider for each additional dimension. Changing the Axes You can change the way the visualizer lays out your data by changing the numbers that label the axes. Click in the box surrounding the number; it is Version 1.2, March 1993 Copyright 0 1993 Thinking Machines Corporation
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Prism User's Guide - CSAIL People - MIT

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