Abstract: According to an embodiment, an electronic device includes a processor. The processor is configured to perform: formula input process of inputting a plurality of pieces of formula data in association with respective formula numbers through a user operation; a formula setting process of setting formula data in the pieces of formula data input by the formula input process as an output target by the user operation; cited formula extraction process of extracting another formula data in the pieces of formula data when the formula data set by the formula setting process cites a formula number of the another formula data; and a data output process of outputting the set formula data with the extracted another formula data.

Abstract: An expression processing device of the present invention includes an input unit, a display and a processor. The processor is configured to perform following processes: inputting an expression in response to a user's operation on the input unit; detecting a plurality of variables included in the expression input by the input unit, among the plurality of variables which are usable in expressions; and outputting the input expression and variable values associated with the detected variables.

Abstract: According to an embodiment, an electronic device includes a processor. The processor is configured to perform: formula input process of inputting a plurality of pieces of formula data in association with respective formula numbers through a user operation; a formula setting process of setting formula data in the pieces of formula data input by the formula input process as an output target by the user operation; cited formula extraction process of extracting another formula data in the pieces of formula data when the formula data set by the formula setting process cites a formula number of the another formula data; and a data output process of outputting the set formula data with the extracted another formula data.

Abstract: There is provided a matrix calculation apparatus. The apparatus includes: a matrix calculation formula display controller configured to display a matrix calculation formula on a display unit, wherein the matrix calculation formula comprises a first matrix; a matrix display controller configured to display a second matrix on the display unit; a submatrix receiver configured to input the second matrix into a certain element of the first matrix as a submatrix of the first matrix in response to a user operation; and a matrix size change display controller configured to change a size of the first matrix in accordance with a size of the second matrix and the certain element of the first matrix into which the second matrix is input and then display the matrix calculation formula.

Abstract: An electronic device includes: a display unit which displays data and a two-dimensional code; and a processor. The processor performs: an encoding process of encoding the data displayed on the display unit into the two-dimensional code; a two-dimensional code displaying process of performing a first masking operation to the two-dimensional code with a first mask pattern and displaying the code having been subjected to the first masking operation on the display unit; and a two-dimensional code changing process of performing a second masking operation to the two-dimensional code with a second mask pattern, and displaying the code having been subjected to the second masking operation instead of the code having been subjected to the first masking operation on the display unit, when a user operation is executed while the two-dimensional code having been subjected to the first masking operation is displayed on the display unit.

Abstract: An electronic device including: a display unit which displays a code generated based on tabular data; and a processor, wherein the processor performs: a compressing process of compressing numerical data having a plurality of digits and contained in the tabular data by reducing the number of digits of the numerical data; an encoding process of encoding the tabular data containing the numerical data compressed through the compressing process; and a code displaying process of displaying a code obtained by the encoding process on the display unit.

Abstract: An electronic device includes: a display unit which displays data and a two-dimensional code; and a processor. The processor performs: an encoding process of encoding the data displayed on the display unit into the two-dimensional code; a two-dimensional code displaying process of performing a first masking operation to the two-dimensional code with a first mask pattern and displaying the code having been subjected to the first masking operation on the display unit; and a two-dimensional code changing process of performing a second masking operation to the two-dimensional code with a second mask pattern, and displaying the code having been subjected to the second masking operation instead of the code having been subjected to the first masking operation on the display unit, when a user operation is executed while the two-dimensional code having been subjected to the first masking operation is displayed on the display unit.

Abstract: According to an embodiment, an electronic device includes a processor. The processor is configured to perform: formula input process of inputting a plurality of pieces of formula data in association with respective formula numbers through a user operation; a formula setting process of setting formula data in the pieces of formula data input by the formula input process as an output target by the user operation; cited formula extraction process of extracting another formula data in the pieces of formula data when the formula data set by the formula setting process cites a formula number of the another formula data; and a data output process of outputting the set formula data with the extracted another formula data.

Abstract: An expression processing device of the present invention includes an input unit, a display and a processor. The processor is configured to perform following processes: inputting an expression in response to a user's operation on the input unit; detecting a plurality of variables included in the expression input by the input unit, among the plurality of variables which are usable in expressions; and outputting the input expression and variable values associated with the detected variables.

Abstract: A calculator includes an input unit and a processor. The processor is configured to perform following processes: receiving a selection of a calculation function type according to a user's operation; receiving an input of calculation object data according to the selected calculation function type, according to a user's operation; and outputting at least one of the calculation object data and calculation result data obtained by a calculation based on the input calculation object data, as external data.

Abstract: A matrix calculation device includes a first partition position display unit configured to distinguishably display a partition position of the one matrix partitioned by the matrix partitioning unit, a partition position determination unit configured to determine, based on a partition position of the one matrix distinguishably displayed by the first partition position display unit and a definition of a product of matrices, a partition position of the other matrix, and a second partition position display unit configured to distinguishably display the partition position of the other matrix determined by the partition position determination unit.

Abstract: There is provided a matrix calculation apparatus. The apparatus includes: a matrix calculation formula display controller configured to display a matrix calculation formula on a display unit, wherein the matrix calculation formula comprises a first matrix; a matrix display controller configured to display a second matrix on the display unit; a submatrix receiver configured to input the second matrix into a certain element of the first matrix as a submatrix of the first matrix in response to a user operation; and a matrix size change display controller configured to change a size of the first matrix in accordance with a size of the second matrix and the certain element of the first matrix into which the second matrix is input and then display the matrix calculation formula.

Abstract: A matrix calculation device includes a first partition position display unit configured to distinguishably display a partition position of the one matrix partitioned by the matrix partitioning unit, a partition position determination unit configured to determine, based on a partition position of the one matrix distinguishably displayed by the first partition position display unit and a definition of a product of matrices, a partition position of the other matrix, and a second partition position display unit configured to distinguishably display the partition position of the other matrix determined by the partition position determination unit.