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  2. TI SR-50 - Wikipedia

    en.wikipedia.org/wiki/TI_SR-50

    SR-50 (1974) Printed circuit board. Data code 035: 3rd week 1975. The SR-50 was Texas Instruments' first scientific pocket calculator with trigonometric and logarithm functions. . It enhanced their earlier SR-10 and SR-11 calculators, introduced in 1973, which had featured scientific notation, squares, square root, and reciprocals, but had no trig or log functions, and lacked other featur

  3. Trading statement - Wikipedia

    en.wikipedia.org/wiki/Trading_statement

    The trading statement is an expanded version of sales portion of the Income statement. The trading statement's main objective is to determine sales, cost of sales and gross profit . [ 1 ] The trading statement is part of effective book keeping within the accounting discipline .

  4. L1-norm principal component analysis - Wikipedia

    en.wikipedia.org/wiki/L1-norm_principal...

    L1-norm principal component analysis (L1-PCA) is a general method for multivariate data analysis. [1] L1-PCA is often preferred over standard L2-norm principal component analysis (PCA) when the analyzed data may contain outliers (faulty values or corruptions), as it is believed to be robust .

  5. Principal component analysis - Wikipedia

    en.wikipedia.org/wiki/Principal_component_analysis

    The k-th principal component of a data vector x (i) can therefore be given as a score t k(i) = x (i) ⋅ w (k) in the transformed coordinates, or as the corresponding vector in the space of the original variables, {x (i) ⋅ w (k)} w (k), where w (k) is the kth eigenvector of X T X. The full principal components decomposition of X can therefore ...

  6. Orthogonality principle - Wikipedia

    en.wikipedia.org/wiki/Orthogonality_principle

    Stated in such a manner, this principle is simply a statement of the Hilbert projection theorem. Nevertheless, the extensive use of this result in signal processing has resulted in the name "orthogonality principle."

  7. Calculator input methods - Wikipedia

    en.wikipedia.org/wiki/Calculator_input_methods

    On a single-step or immediate-execution calculator, the user presses a key for each operation, calculating all the intermediate results, before the final value is shown. [1] [2] [3] On an expression or formula calculator, one types in an expression and then presses a key, such as "=" or "Enter", to evaluate the expression.

  8. Pivotal quantity - Wikipedia

    en.wikipedia.org/wiki/Pivotal_quantity

    In statistics, a pivotal quantity or pivot is a function of observations and unobservable parameters such that the function's probability distribution does not depend on the unknown parameters (including nuisance parameters). [1]

  9. Statement of changes in equity - Wikipedia

    en.wikipedia.org/wiki/Statement_of_changes_in_equity

    Therefore, the statement of retained earnings uses information from the income statement and provides information to the balance sheet. Retained earnings are part of the balance sheet (another basic financial statement) under "stockholders equity (shareholders' equity)" and is mostly affected by net income earned during a period of time by the ...