3 |
3 |
4 .. A - Students and teachers from Science and engineering backgrounds |
4 .. A - Students and teachers from Science and engineering backgrounds |
5 B - |
5 B - |
6 C - |
6 C - |
7 D - |
7 D - |
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8 |
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9 .. By the end of this tutorial you will be able to |
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10 |
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11 .. * Modify the attributes of the plot -- color, line style, linewidth |
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12 .. * Add a title to the plot with embedded LaTeX. |
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13 .. * Label x and y axes. |
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14 .. * Add annotations to the plot. |
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15 .. * Set and Get the limits of axes. |
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16 |
8 |
17 |
9 .. Prerequisites |
18 .. Prerequisites |
10 .. ------------- |
19 .. ------------- |
11 |
20 |
12 .. 1. Using the ``plot`` command interactively |
21 .. 1. Using the ``plot`` command interactively |
172 |
181 |
173 {{{ continue from paused state }}} |
182 {{{ continue from paused state }}} |
174 |
183 |
175 .. #[Madhu: I did not understand the question] |
184 .. #[Madhu: I did not understand the question] |
176 |
185 |
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186 :: |
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187 clf() |
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188 plot(x, cos(x), 'r--') |
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189 |
177 Now that we know how to produce a bare minimum plot with colour, style |
190 Now that we know how to produce a bare minimum plot with colour, style |
178 and thickness of our interest, we shall look at decorating the plot. |
191 and thickness of our interest, we shall look at decorating the plot. |
179 |
192 |
180 Let us start with a plot of the function -x^2 + 4x - 5. |
193 Let us start with a plot of the function -x^2 + 4x - 5. |
181 :: |
194 :: |
182 |
195 |
183 plot(x, -x*x + 4*x - 5, 'r', linewidth=2) |
196 plot(x, -x*x + 4*x - 5, 'r', linewidth=2) |
184 |
197 |
185 {{{ Show the plot window and switch back to terminal }}} |
198 {{{ Show the plot window and switch back to terminal }}} |
186 |
199 |
187 We now have the plot in a colour and linewidth of our interest. As you can see, |
200 We now have the plot in a colour and linewidth of our interest. As you |
188 the figure does not have any description describing the plot. |
201 can see, the figure does not have any description describing the plot. |
189 |
202 |
190 .. #[Madhu: Added "not". See the diff] |
203 .. #[Madhu: Added "not". See the diff] |
191 |
204 |
192 We will now add a title to the plot by using the ``title`` command. |
205 We will now add a title to the plot by using the ``title`` command. |
193 :: |
206 :: |
202 |
215 |
203 .. #[Madhu: See the diff] |
216 .. #[Madhu: See the diff] |
204 |
217 |
205 The formatting in title is messed and it does not look clean. You can imagine |
218 The formatting in title is messed and it does not look clean. You can imagine |
206 what would be the situation if there were fractions and more complex functions |
219 what would be the situation if there were fractions and more complex functions |
207 like log and exp. Wouldn't it be good if there was LaTex like formatting? |
220 like log and exp. Wouldn't it be good if there was LaTeX like formatting? |
208 |
221 |
209 That is also possible by adding a $ sign before and after the part of the |
222 That is also possible by adding a $ sign before and after the part of the |
210 string that should be in LaTex style. |
223 string that should be in LaTeX style. |
211 |
224 |
212 for instance, we can use |
225 for instance, we can use |
213 :: |
226 :: |
214 |
227 |
215 title("Parabolic function $-x^2+4x-5$") |
228 title("Parabolic function $-x^2+4x-5$") |
216 |
229 |
217 and we get the polynomial formatted properly. |
230 and we get the polynomial formatted properly. |
218 |
231 |
219 .. #[Nishanth]: Unsure if I have to give this exercise since enclosing the whole |
232 .. #[Nishanth]: Unsure if I have to give this exercise since enclosing the whole |
220 string in LaTex style is not good |
233 string in LaTeX style is not good |
221 |
234 |
222 .. #[[Anoop: I guess you can go ahead with the LaTex thing, it's |
235 .. #[[Anoop: I guess you can go ahead with the LaTeX thing, it's |
223 cool!]] |
236 cool!]] |
224 .. #[Madhu: Instead of saying LaTeX style you can say Typeset math |
237 .. #[Madhu: Instead of saying LaTeX style you can say Typeset math |
225 since that is how it is called as. I am not sure as well. It |
238 since that is how it is called as. I am not sure as well. It |
226 doesn't really solve the purpose] |
239 doesn't really solve the purpose] |
227 |
240 |
228 {{{ Pause here and try out the following exercises }}} |
241 {{{ Pause here and try out the following exercises }}} |
229 |
242 |
230 %% 4 %% Change the title of the figure such that the whole title is formatted |
243 %% 4 %% Change the title of the figure such that the whole title is formatted |
231 in LaTex style |
244 in LaTeX style |
232 |
245 |
233 {{{ continue from the paused state }}} |
246 {{{ continue from the paused state }}} |
234 |
247 |
235 The solution is to enclose the whole string in between $. Hence, |
248 The solution is to enclose the whole string in between $. Hence, |
236 :: |
249 :: |
260 |
273 |
261 {{{ Show the plot window and point to ylabel and switch back to the terminal }}} |
274 {{{ Show the plot window and point to ylabel and switch back to the terminal }}} |
262 |
275 |
263 {{{ Pause here and try out the following exercises }}} |
276 {{{ Pause here and try out the following exercises }}} |
264 |
277 |
265 %% 5 %% Set the x and y labels as "x" and "f(x)" in LaTex style. |
278 %% 5 %% Set the x and y labels as "x" and "f(x)" in LaTeX style. |
266 |
279 |
267 {{{ continue from paused state }}} |
280 {{{ continue from paused state }}} |
268 |
281 |
269 Since we need LaTex style formatting, all we have to do is enclose the string |
282 Since we need LaTeX style formatting, all we have to do is enclose the string |
270 in between two $. Hence, |
283 in between two $. Hence, |
271 :: |
284 :: |
272 |
285 |
273 xlabel("$x$") |
286 xlabel("$x$") |
274 yalbel("$f(x)$") |
287 yalbel("$f(x)$") |
301 %% 6 %% Make an annotation called "root" at the point (-4, 0) |
314 %% 6 %% Make an annotation called "root" at the point (-4, 0) |
302 What happens to the first annotation ? |
315 What happens to the first annotation ? |
303 |
316 |
304 {{{ continue from paused state }}} |
317 {{{ continue from paused state }}} |
305 |
318 |
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319 :: |
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320 |
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321 annotate("root", xy=(-4,0)) |
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322 |
306 As we can see, every annotate command makes a new annotation on the figure. |
323 As we can see, every annotate command makes a new annotation on the figure. |
307 |
324 |
308 Now we have everything we need to decorate a plot. but the plot would be |
325 Now we have everything we need to decorate a plot. but the plot would be |
309 incomplete if we can not set the limits of axes. This is possible using the |
326 incomplete if we can not set the limits of axes. This is possible using the |
310 button on the plot window. |
327 button on the plot window. |
352 |
369 |
353 we have looked at |
370 we have looked at |
354 |
371 |
355 * Modifying the attributes of plot by passing additional arguments |
372 * Modifying the attributes of plot by passing additional arguments |
356 * How to add title |
373 * How to add title |
357 * How to incorporate LaTex style formatting |
374 * How to incorporate LaTeX style formatting |
358 * How to label x and y axes |
375 * How to label x and y axes |
359 * How to add annotations |
376 * How to add annotations |
360 * How to set the limits of axes |
377 * How to set the limits of axes |
361 |
378 |
362 {{{ Show the "sponsored by FOSSEE" slide }}} |
379 {{{ Show the "sponsored by FOSSEE" slide }}} |