Analysis - Revision history

SuperMemoHelp: /* Further reading */

2019-07-25T10:30:24Z

SuperMemoHelp: /* FAQ */

2019-07-25T10:28:43Z

FAQ

← Older revision		Revision as of 06:28, 25 July 2019
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	== FAQ ==		== FAQ ==

	* [~~http~~://supermemopedia.com/wiki/Weirdness_in_my_collection I worry my graphs look weird and I do something wrong]		* [https://supermemopedia.com/wiki/Weirdness_in_my_collection I worry my graphs look weird and I do something wrong]
			* [https://supermemopedia.com/wiki/Random_numbers_showed_up_in_data_used_by_the_algorithm Errors in data in Analysis]

	== Further reading ==		== Further reading ==

SuperMemoHelp: /* Stabilization */

2019-05-15T21:09:02Z

Stabilization

← Older revision		Revision as of 17:09, 15 May 2019
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	== Stabilization ==		== Stabilization ==

	The tab marked '''Stabiliz.''' in '''Analysis''' can be used to inspect [[stabilization curve]]s in SuperMemo.		The tab marked '''Stabiliz.''' in '''Analysis''' can be used to inspect [[Glossary:stabilization curve\|stabilization curve]]s in SuperMemo.

	[[File:Stabilization curve.jpg\|800px\|center\|Inspecting stabilization curves for various levels of stability and difficulty]]		[[File:Stabilization curve.jpg\|800px\|center\|Inspecting stabilization curves for various levels of stability and difficulty]]

SuperMemoHelp: /* Stabilization */

2019-05-15T21:06:22Z

Stabilization

← Older revision		Revision as of 17:06, 15 May 2019
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	== Stabilization ==		== Stabilization ==

	The tab marked '''Stabiliz.''' in '''Analysis''' can be used to inspect [[~~Glossary:~~stabilization curve]]s in SuperMemo.		The tab marked '''Stabiliz.''' in '''Analysis''' can be used to inspect [[stabilization curve]]s in SuperMemo.

	[[File:Stabilization curve.jpg\|800px\|center\|Inspecting stabilization curves for various levels of stability and difficulty]]		[[File:Stabilization curve.jpg\|800px\|center\|Inspecting stabilization curves for various levels of stability and difficulty]]

SuperMemoHelp: /* Stabiliz */

2019-05-15T21:05:45Z

Stabiliz

← Older revision		Revision as of 17:05, 15 May 2019
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	{{:Image:Cumulative forgetting curve.jpg}}		{{:Image:Cumulative forgetting curve.jpg}}

	== ~~Stabiliz~~ ==		== Stabilization ==

	~~<div class="center">~~		The tab marked '''Stabiliz.''' in '''Analysis''' can be used to inspect [[Glossary:stabilization curve]]s in SuperMemo.
	[[File:Stabilization curve.jpg\|800px\|~~Possibility to inspect the~~ stabilization ~~curve~~ for various stability and difficulty ~~levels~~]]
			[[File:Stabilization curve.jpg\|800px\|center\|Inspecting stabilization curves for various levels of stability and difficulty]]
	{{:File:Stabilization curve.jpg}}		{{:File:Stabilization curve.jpg}}
	~~</div>~~

	~~zzz~~

	== Graphs ==		== Graphs ==

SuperMemoHelp at 11:14, 1 May 2019

2019-05-01T11:14:20Z

← Older revision		Revision as of 07:14, 1 May 2019
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	== Forgetting ==		== Forgetting ==

	~~xxx~~		400 [[Glossary:Forgetting_curve\|forgetting curves]] are independently plotted in order to compute the SInc matrix in [https://supermemo.guru/wiki/Algorithm_SM-18 Algorithm SM-18]. These correspond to 20 stability categories and 20 difficulty categories. By choosing a proper combination of tabs at the bottom of the graph, you can select a [[Glossary:Forgetting_curve\|forgetting curve]] of interest. Horizontal axis represents time expressed as: (1) retrievability, or (2) days (only for the first [[Glossary:Repetition\|repetition]]). Vertical axis represents [[Glossary:Retention\|knowledge retention]] in percent.

			[[Image:First forgetting curve.jpg\|center\|600px\|SuperMemo: The first forgetting curve (first repetition for items with no lapses)]]
			{{:Image:First forgetting curve.jpg}}

	== Forgetting (UF) ==		== Forgetting (UF) ==

			This tab displays forgetting data as used in older SuperMemos. It is only used to record and display comparisons between the new algorithm and the older algorithms.

	400 [[Glossary:Forgetting_curve\|forgetting curves]] are independently plotted in order to compute the RF matrix in [https://supermemo.guru/wiki/Algorithm_SM-15 Algorithm SM-15]. These correspond to 20 repetition number categories and 20 [[Glossary:A-Factor\|A-Factor]] categories. For data representation convenience, the columns of the RF matrix for the first repetition are indexed by the number of [[Glossary:Lapse\|memory lapses]] rather than by the [[Glossary:A-Factor\|A-Factor]]. By choosing a proper combination of tabs at the bottom of the graph, you can select a [[Glossary:Forgetting_curve\|forgetting curve]] of interest. Horizontal axis represents time expressed as: (1) [[Glossary:U-Factor\|U-Factor]], i.e. the ratio of subsequent inter-repetition [[Glossary:Interval\|intervals]], or (2) days (only for the first [[Glossary:Repetition\|repetition]]). Vertical axis represents [[Glossary:Retention\|knowledge retention]] in percent.		400 [[Glossary:Forgetting_curve\|forgetting curves]] are independently plotted in order to compute the RF matrix in [https://supermemo.guru/wiki/Algorithm_SM-15 Algorithm SM-15]. These correspond to 20 repetition number categories and 20 [[Glossary:A-Factor\|A-Factor]] categories. For data representation convenience, the columns of the RF matrix for the first repetition are indexed by the number of [[Glossary:Lapse\|memory lapses]] rather than by the [[Glossary:A-Factor\|A-Factor]]. By choosing a proper combination of tabs at the bottom of the graph, you can select a [[Glossary:Forgetting_curve\|forgetting curve]] of interest. Horizontal axis represents time expressed as: (1) [[Glossary:U-Factor\|U-Factor]], i.e. the ratio of subsequent inter-repetition [[Glossary:Interval\|intervals]], or (2) days (only for the first [[Glossary:Repetition\|repetition]]). Vertical axis represents [[Glossary:Retention\|knowledge retention]] in percent.

	~~<div class="center">~~		[[Image:Forgetting curves.jpg\|600px\|center\|SuperMemo: Toolkit : Statistics : Analysis : Forgetting (UF) graphs for 20 repetition number categories multiplied by 20 A-Factor categories]]
	[[Image:~~First forgetting curve~~.jpg\|~~800px~~\|~~SuperMemo: The first forgetting curve (first repetition for items with no lapses)]]~~
	~~{{:Image:First forgetting curve.jpg}}~~
	~~</div>~~

	~~<div class="~~center">
	~~[[Image:Forgetting curves.jpg\|800px~~\|SuperMemo: Toolkit : Statistics : Analysis : Forgetting (UF) graphs for 20 repetition number categories multiplied by 20 A-Factor categories]]
	{{:Image:Forgetting curves.jpg}}		{{:Image:Forgetting curves.jpg}}
	~~</div>~~

	[[Image:Cumulative forgetting curve.jpg\|center\|800px\|SuperMemo: In SuperMemo 18, forgetting curves can be normalized over A-Factors at different repetition categories. As a result, you can display (1) your cumulative forgetting curve (blue dots), (2) its negative exponential approximation used by SuperMemo (red line) and (3) individual data points from all forgetting curves collected by SuperMemo (yellow circles).]]		[[Image:Cumulative forgetting curve.jpg\|center\|800px\|SuperMemo: In SuperMemo 18, forgetting curves can be normalized over A-Factors at different repetition categories. As a result, you can display (1) your cumulative forgetting curve (blue dots), (2) its negative exponential approximation used by SuperMemo (red line) and (3) individual data points from all forgetting curves collected by SuperMemo (yellow circles).]]

SuperMemoHelp: /* Stabiliz */

2019-04-30T16:07:26Z

Stabiliz

← Older revision		Revision as of 12:07, 30 April 2019
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	== Stabiliz ==		== Stabiliz ==

	~~xxx~~		<div class="center">
			[[File:Stabilization curve.jpg\|800px\|Possibility to inspect the stabilization curve for various stability and difficulty levels]]
			{{:File:Stabilization curve.jpg}}
			</div>

			zzz

	== Graphs ==		== Graphs ==

SuperMemoHelp: /* Stabiliz. */

2019-04-30T08:33:17Z

Stabiliz.

← Older revision		Revision as of 04:33, 30 April 2019
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	{{:Image:Cumulative forgetting curve.jpg}}		{{:Image:Cumulative forgetting curve.jpg}}

	== Stabiliz. ==		== Stabiliz ==

	xxx		xxx

SuperMemoHelp: /* Use : Efficiency : R-Metric */

2019-04-12T19:38:53Z

Use : Efficiency : R-Metric

← Older revision		Revision as of 15:38, 12 April 2019
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	<div class="center">		<div class="center">
	[[Image:~~Daily_Algorithm_SM-17_performance_metric~~.jpg\|800px\|SuperMemo: ~~The ultimate performance metric for~~ Algorithm SM-~~17 against the old Algorithm SM-15~~]]		[[Image:Recall metric.jpg\|800px\|SuperMemo: Algorithm SM-18 performance metric]]
	{{:Image:~~Daily Algorithm SM-17 performance~~ metric.jpg}}		{{:Image:Recall metric.jpg}}
	</div>		</div>

SuperMemoHelp at 14:05, 6 April 2019

2019-04-06T14:05:54Z

← Older revision		Revision as of 10:05, 6 April 2019
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	=== Grade vs. Forgetting Index ===		=== Grade vs. Forgetting Index ===

	'''<span id="G-FI_graph">Grade vs. Forgetting Index</span>''' - FI-G graph correlates the [https://supermemo.guru/wiki/~~20_rules_of_knowledge_formulation~~#expected_forgetting_index expected forgetting index] with the [[Glossary:Grade\|grade]] scored at repetitions. You need to understand [https://supermemo.guru/wiki/Algorithm_SM-15 SuperMemo Algorithm SM-15] to understand this graph. You can imagine that the [[Glossary:Forgetting_curve\|forgetting curve]] graph might use the average [[Glossary:Grade\|grade]] instead of the [[Glossary:Retention\|retention]] on its vertical axis. If you correlated this grade with the [[Glossary:Forgetting_index\|forgetting index]], you would arrive at the FI-G graph. This graph is used to compute an [https://supermemo.guru/wiki/~~20_rules_of_knowledge_formulation~~#estimated_forgetting_index estimated forgetting index] that is in turn used to normalize grades (for delayed or advanced repetitions) and estimate the new value of [[Glossary:Item\|item]]'s [[Glossary:A-Factor\|A-Factor]]. The grade is computed using the formula: ''Grade=Exp(A*FI+B)'', where A and B are parameters of an exponential regression run over raw data collected during repetitions.		'''<span id="G-FI_graph">Grade vs. Forgetting Index</span>''' - FI-G graph correlates the [https://supermemo.guru/wiki/Forgetting_index_in_SuperMemo#expected_forgetting_index expected forgetting index] with the [[Glossary:Grade\|grade]] scored at repetitions. You need to understand [https://supermemo.guru/wiki/Algorithm_SM-15 SuperMemo Algorithm SM-15] to understand this graph. You can imagine that the [[Glossary:Forgetting_curve\|forgetting curve]] graph might use the average [[Glossary:Grade\|grade]] instead of the [[Glossary:Retention\|retention]] on its vertical axis. If you correlated this grade with the [[Glossary:Forgetting_index\|forgetting index]], you would arrive at the FI-G graph. This graph is used to compute an [https://supermemo.guru/wiki/Forgetting_index_in_SuperMemo#estimated_forgetting_index estimated forgetting index] that is in turn used to normalize grades (for delayed or advanced repetitions) and estimate the new value of [[Glossary:Item\|item]]'s [[Glossary:A-Factor\|A-Factor]]. The grade is computed using the formula: ''Grade=Exp(A*FI+B)'', where A and B are parameters of an exponential regression run over raw data collected during repetitions.

	[[Image:Grade vs Forgetting index.jpg\|center\|800px\|SuperMemo: Toolkit : Statistics : Analysis : Graphs : Grade vs. Forgetting index graph]]		[[Image:Grade vs Forgetting index.jpg\|center\|800px\|SuperMemo: Toolkit : Statistics : Analysis : Graphs : Grade vs. Forgetting index graph]]

← Older revision		Revision as of 06:30, 25 July 2019
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	== Further reading ==		== Further reading ==
			*[[Memory graphs (4D)]]
	*[~~http://super-memory.com/help/faq/memory.htm FAQ:~~ Memory ~~and learning~~]
	*[http://super-memory.com/articles/theory.htm SuperMemo Theory]
	*[https://supermemo.guru/wiki/SuperMemo_Algorithm SuperMemo Algorithm]		*[https://supermemo.guru/wiki/SuperMemo_Algorithm SuperMemo Algorithm]
	*[[Memory graphs (4D)]]
	*[https://supermemo.guru/wiki/Algorithm_SM-15 SuperMemo Algorithm SM-15]		*[https://supermemo.guru/wiki/Algorithm_SM-15 SuperMemo Algorithm SM-15]
			*[http://super-memory.com/help/faq/memory.htm FAQ: Memory and learning]
			*[http://super-memory.com/articles/theory.htm SuperMemo Theory]